Thanks for the info about the MegNeg! I had been considering it... I was worried it might not fit, but looks like it just squeaks in there.
My shock came with 2 tokens in it already, and I kept bottoming it out off jumps/drops, so I put in a third token and I'm maxed out. I'm not bottoming out hard anymore, but I do feel like it might be better if I had more negative air, and more pressure to keep the overall spring curve more linear. What was your final setup for number of bands in the MegNeg? I'm curious to know how much negative/positive air volume you're using.
I don't think this frame's leverage ratio curve is very progressive, considering how many tokens I need, and the fact that you like the MegNeg so much. Considering the lack of progression in the frame design, I would recommend against putting in a coil. Since you can't manipulate the negative and positive air volumes on a coil to compensate for lack of frame progression, it's likely that a coil would run like crap on this frame.