best material for engineering purposes

:lol:  that makes a big difference. with these sittings even ABS will have less warping as well.

no, with the ABS surface finish it is worse, and the dimensional tolerance is not comparable, even using the same precautions that I used to HIPS

;)

Print with zortrax completely open, wide and thin pieces is impossible

I've no warping problems as well with acetone+ABS on plate, but large parts are always bended on its bases. 

Is there a way to reduce or remove this bending?

I've no warping problems as well with acetone+ABS on plate, but large parts are always bended on its bases. 

Is there a way to reduce or remove this bending?

that is correct, parts can detach at their base with the raft. its best to try and round your corners