That block looks very good for an .8mm nozzle printing that fast! I can’t get my .4mm over 35mm/s without loosing a lot of layer bonding strength even if I turn up the heat a lot.
The rounded overhang always prints kinda crudy so don’t worry about that, hopefully it is out of the way enough. The rest looks great!
Do you have any printing videos up anywhere? I wouldn’t mind seeing that in action.
The mpcnc can handle high speeds very well but that .4mm nozzle seems to limit it. I guess I will put on a .5mm and see what happens.