[asid61]

Looks great! 47lbs is a very good weight with electronics on there. Electronics all seemt of it well, but you have some wasted space underneath that top plate.

I noticed that your hex axles have a deep groove cut right before the end. This will weaken the axle by a lot. Why is it there?
Pulleys also seema bit large... the belts won't intersect with anything, right?

EDIT: Out of curiosity, how does this go together? Do you make puzzle-piece edges and glue them? How do you get machine screws into joints?