The ABS didn't scratch the N900 the two times I inserted it for allignment test. I think I will try a caliper like set of horns that taper to points to actually grip the phone rather than box it in as in the Mk-I design, one size for Mugen battery cover users(double scud) and the other for stock N900s.
Bill_klpd mentioned making it more like the PSP https://en.wikipedia.org/wiki/PlayStation_Portable after viewing his pictures I think it could make it easier to just forget about the cross shaped rocker Dpad with its center pivot fulcrum. again let the gamers speak I truly dont know which I would prefer, strong opinions appreciated.
Nokiabot, I broke most of the grey buttons so now I need to print more and test with the prototype top. Will photograph better when the second prototype is out and will upload to thingiverse.
SInce I hope the Mk II will be a keeper I plan to print 0.1mm high layers so it will look nicer and will be a bit tougher but take about 4x longer.