One Legged T-Rex (OLTR)

[luke]

The T-Rex is designed to vent the same as the MSV2 and Cheater valves. It allows the internal pressure to be de-gassed so the ram can be reset freely. For all intents and purposes it's a built in QEV.

As far as the squeaking, I've never experienced that, could be that the supply air is just the right pressure for it to whistle or something. I would re-adjust the LPR, my bet is it's WAY to high.

[barkingspider]

Yep love mine. I have to echo the sweetness of the ultra blade trigger w/ OLTR. I have it waiting for anno.

Luke Really like your work, customer service and ingenuity.

This marker below also has your OLTR and some other handy work by Luke.

[luke]

rawbutter, the proper way to adjust the LPR is to turn the adjuster screw all the way out until it shuts off the air entirely. Then with the marker aired up, you turn the set screw a little at a time until the marker fires. From there I start adjusting the lpr to find the RT sweet spot, then continue in small increments to fine tune to taste. My bet is the squeak is because he's running 100+ psi out of the LPR, which is completely unnecessary.

[luke]

barkingspider, I love to see these builds! It's neat to see multiple aftermarket vender's parts come together for something completely custom and one of a kind.

[stircrazzzy]

Hey Luke, I've been out of the game for a while and am just recently catching up. Is there a FAQ somewhere that discussed how the oltr t-Rex works? I've always been a pneumag guy so this is quite interesting.


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[luke]

I never put anything like that together, this thread probably covers most everything. But feel free to post any questions here.

[rawbutter]

rawbutter, the proper way to adjust the LPR is to turn the adjuster screw all the way out until it shuts off the air entirely. Then with the marker aired up, you turn the set screw a little at a time until the marker fires. From there I start adjusting the lpr to find the RT sweet spot, then continue in small increments to fine tune to taste. My bet is the squeak is because he's running 100+ psi out of the LPR, which is completely unnecessary.

I actually did exactly what you described, a couple of times, actually, because I thought I was doing something wrong (even though this wasn't my first pneumag build by far). But it still squeaks. We found the sweat spot where it RTs, and then went a little lower...or higher...I can't remember.

I mean, it still works perfectly fine. I wish I had taken some video. Maybe if he joins me next time I go out, I can capture a sample.

[luke]

I suppose I would need to hear it myself to determine if the sound is normal or not, it could be the description of the sound were stuck on. lol

The only thing I could suggest at this time would be to cycle a drop or two of oil through it.

[zulubravo44]

zulu b, have you tried the Ultrablade trigger with the OLTR? Hands down it's the best trigger to use with the T-rex.

Yup, have the ultrablade now and it's a huge upgrade to the other one I had on before it (one of your argos). It rocks at walking, and like BLachance75, it makes up for my lack of ability to do so

I have gotten similar feedback... people's jaws drop when I tell them that the only part of it that has batteries is the hopper. One thing I've noticed is that I probably need to put some teflon tape to get a little extra "stick" on the regulator screw on the LPR. I think over time, it moves a bit and seems to alter the tuning slightly. The OLTR itself has performed flawlessly for me. My build still isn't "done," since I haven't taken it in for ano yet. But it's more than usable, and has seen some field time between pump days.

On the "squeak" mentioned by rawbutter, I get more of a "buzz" when I hold the trigger down. It's definitely the OLTR venting air, and it changes a little bit in terms of how it sounds at different levels of LPR input pressure. Just don't hold the trigger down unless you have it tuned to RT one's face off... it's a waste of gas!

[BLachance75]

All this OLTR talk makes me want to shoot mine. I'll have to see if I have air in any of my tanks and shoot it a little tomorrow morning before work if I do.

[luke]

One thing I've noticed is that I probably need to put some teflon tape to get a little extra "stick" on the regulator screw on the LPR. I think over time, it moves a bit and seems to alter the tuning slightly.

I'll make a note of that. However it doesn't really surprise me because the LPR chugs away like a piston when you hammer on the trigger.

I'll have to see if locktite makes something that would work without giving us any trouble.

[BLachance75]

I know that my adjustment screw turns pretty easily as well. I haven't shot it enough at one time to know if it will move on its own. Every time I've shot it I've messed around with the LPR due to using different tanks that have different outputs.

[zulubravo44]

All this OLTR talk makes me want to shoot mine. I'll have to see if I have air in any of my tanks and shoot it a little tomorrow morning before work if I do.

That's the spirit!

[luke]

One thing I've noticed is that I probably need to put some teflon tape to get a little extra "stick" on the regulator screw on the LPR. I think over time, it moves a bit and seems to alter the tuning slightly.

I'll make a note of that. However it doesn't really surprise me because the LPR chugs away like a piston when you hammer on the trigger.

I'll have to see if locktite makes something that would work without giving us any trouble.

I just sent loc-tite an email requesting product information that may help with this, hopefully they make a product that will fit the bill. I've been wanting to check on this for years (lol) mainly for trigger set screws to avoid having to use teflon or a thread lock.

[barkingspider]

I wonder if it's the purple loc-tite you might be eluding to? I put that on the set screws of the triggers I have. It seems to work well since it prevents movement of the set place, but if you wanted to move it with an allen wrench its no problem to break the seal.