Yes. Tune your level 10 first. Take out the level 10 powertube shims. Then use the largest carrier size that does not produce a leak. Always use the same white oring in each carrier that you use.
Once you know you are using the correct carrier size, you can work on the ULT. Start with 3 shims in the ULT. Try it to see if it cycles properly. Add a shim and try it again. Once you get bursts or bolt stick, remove the extra shim that caused it. That should be your optimum ULT setup. Remove an extra shim to guarantee operation in almost all cases.
Don't get the ULT and level 10 shims mixed up. The ULT shims are 0.005" thick and the level 10 shims are 0.010" thick. You can interchange them, but you need to be aware that 1 level 10 shim is the same as 2 ULT shims.
Except for the Automag in front, its usually the man behind the equipment that counts.