I found these extrusion profiles on Ebay:
http://cgi.ebay.com/80-20-T-Slot-Alu...#ht_1139wt_905
These are 1 inch instead of the 30mm that i used. It gives a slightly slimmer look and also give a 0,5mm clearance in both sections. They are not smooth on the curved edge but i like that.![]()