In conclusion you think it was a good idea to lower the temperature or to raise the speed?

I agree to your scaling issues. I have the same problem, but it is not so importent for my to solve it. But if you have a solution please post it.

My main problem is to print big part (9*9*9) with constant quality. I alway run in trouble. (Warping, defect endstopper, loose nut, less powder).

It is very frustrating that i have no support access anymore and there is no realy active community who share there problems and there solutions.