I'm figuring out how to use Solidworks; just in the beginning stages of taking the trike design from 2D in AutoCAD to 3D in Solidworks. But thats not what I bought today.
Ordered a Nuvinci wheel kit. On one hand, the idea of mounting half a bowling ball inside my rear hub just doesn't sit well with me. On the other hand having the ability to infinitely adjust my cadence may (or may not) make it worthwhile.
I tried a Nuvinci a couple months ago, and frankly for longer rides it felt really good. Forget the slingshot starts; only a derailleur will do there. Then again I don't slingshot very often anyway.
Considered a Rohloff with a single chainring, and still may go that way, but the cost is a bit steep. Noisey little bugger too. Tried one with about 5000 miles on it and it was indeed cool, but shifting meant moving the pedal as opposed to pushing the pedal while shifting. Upshifting while going uphill was OK, but not near as nice as my trusty Deore XT derailleur.
Tried an Alfine 11 at one point. Like the Rohloff it had its moments going up a long hill. Going from 2-1 felt like skipping a gear which was OK.
So once it's installed and I have a couple hundred miles, I'll either post a report or you'll see it in the Classifieds....