T- slot profile 30X30mm

i was see this profile used to build reprap printer...
so, i was thinking to myself "why not to design and print one of my own?"
its come to replace the aluminium profile, so the printer can be much more cheap... and light!!!
i just finish to design it and not printed it yet!
the size is 12cm, and its have extension so the size is not very meter!

p.s: i was print earlier 5cm to check if its strong...
with 2 layers and infill of 30%, its very strong!
also i use PLA filament to test