Well I've actually got the skeletool now and after a few weeks of EDCing, I've made my first cut(into the tool that is)
I've cut up the carbon fiber insert so there's space in in the bit holder for 2 normal bits, or one long MUT bit.
I ordered MUT replacement bits from here: trailexplorers.com/leatherman-mut-replacement-long-bits-p-958.html
It came with 3 bits, long flat head/phillips combo, long robertson/torx combo and short (small)flat head/phillips combo
Which works out perfectly for my idea, keep the short combo bit in the the drive and the long phillips combo in the modified bit holder.
I was worried that the long bit would be a lot looser and prone to flying out after this mod but it has turned out to be a LOT tighter that the original setup(almost too tight since the bit is so close to the bolt and rivet)
The holder can actually hold 2 normal bit, they feel more secure that the original one bit holder but I'm not likely to EDC than kind of setup
I've changed my game plan a bit since my original post. I'd like another folding blade in there somewhere, but more on that later.