Thanks for the replies,
Great idea using Phillips head bits! This will save hours of labour making something that is pretty much the same.
As for the electronics side of things I'm pretty lucky in this respect, I work in a highly automated sawmill/planer mill; so access to any gizmo is very easy and there is Systems Engineers and Shift Electricians who know how to make any piece of kit do anything. The power supply came from a redundant project where we were using a Co2 laser to apply a # code so it can be tracked throughout the process. The laser would print a 4 digit number on the board at a belt speed of around 400-450mpm.
I like the idea of drilling the UHMWPE and offsetting, much like a quick release vice! I was going to try and track down a proper lead screw, what I have found so far is pricey and being a hack this is out of my scope.
I really like the extruded aluminium, I nearly secured a whole lot at work from an optimiser built in Europe (they love this aluminium stuff) but one engineer realised what it's worth and stubbed that out! It would be easier to work with however, tapping and drilling holes, cutting... Plus we have all the nuts and bolts that fit in the slots at work. I will try and track some down for the final build.
Can't help thinking how many baits I could have just made rather than messing with this...