What rail/drop/whatever would work with this?

[Smoke]

Alright, I'm shooting both a ULE Mag and an Ion, and I currently have a big bullet drop on my Mag. However, when I tried to put it on my Ion it wouldn't fit due to the 90 degree fitting coming out of the reg at the bottom. To make things worse, my tank is MASSIVE. It's a Crossfire 92/4500, so it's pretty freakin' huge. I tried seeing how a straight bottom line works as well as small rail, but the tank is just too dang large to have that far back. Anybody have any suggestions as to what rail or drop I should get to solve this problem?

Thanks in advance.

[MadPSIence]

Dye 05 Mini Drop + Hybrid push buttom on/off asa