I'm a big fan of that long choke and have used it in a build (
First Saber build - "Velocity") if you want to see it, but there are real headaches to building with it. Phoenix Jedi and kwikside are right, there is
very little room in there. It could, theoretically, fit an 18XXX lith-ion but there is no real room for the wires that go with it and the "male" section is much thicker than the normal MHS pieces so stuffing a switch in there would also be iffy even if you can drill in to the joining piece without destroying the threads. I think Madcow once did something with a custom piece similar to the long choke and placing a momentary switch in there, but how is beyond me and it may have had a different ID. I don't think the long choke has to be gotten rid of, but you ay need to rethink how it will interact with surrounding pieces and revisit the design a bit. Best of luck :)