I personally wouldn't go with the older Six-Axis controller for the PS360, it's more of a mess to get all torn down and as slim as possible so it'll fit in the shell along with the 360 controller board. I'd have to look at where to cut that one and what all, if anything, would need to be rebuilt on it trace wise. Long ago I started in on one with the older Six-Axis board, but once I saw it was doable, albeit a real nightmare, I left it alone until the DS3 versions rolled out and have used them since then.
Using a DS3 version means the sticks will be much more work though, whereas with the older Six-Axis you could just leave the 360 controller's sticks in there and use them, unless it's one of the newer version Six-Axis (MSU_V2 & V2.5), but in the long run using the DS3 version is just a better choice for several reasons, mainly it has Rumble, though if you're not interested in that feature you can always leave the motors out of it and it'll be just like a Six-Axis in that respect, but I'd use a DS3 as it'll give you less of a hassle overall. The only version of DS3 to stay away from is the MSU_VX3_0.08 as it has a miniboard that will need removing and rewiring.
This post has been edited by RDC: Apr 15 2010, 03:00 AM