My first own design CNC router

[RobC]

So, I've had it running for just under a week. Learnt quite a bit of mach3 settings, had numerous crashes, many thrown spanners and the one thing i've noticed is that I need more Z. I've been chewing through all sorts of woods and then tried Ali to my surprise it cut it very well. So I've ordered all new pieces of ali plate to re-build the gantry as I hate the current steel one. So £93 lighter I've got 20mm stock on the way to re-make the sides and the span plus the Z-axis plate from 10mm. Now I've got my machine running I'll use it to upgrade itself by doing all the cutting instead of me going round with a set of calipers and punch trying to get them accurate. So a few different things with this upgraded set, M6 bolts to fasten the sides to the span instead of m5's, all the bolts will be sunk into the sides to create a flush finish and the nema 23 has a rebate to sit flush also.

Would anyone have any recommendations to any possible further modifications that may benefit it at all or anything I maybe doing wrong with this design?