Sorry for some reason I was not getting updates on this thread.
I will sell you the parts, It is based on print time + shipping. So parts bundle price /total print time *the print time of the parts you want, as shown on the part page.
The settings you have shown, the repetier settings do nothing for the machine in motion, don’t pay attention to them. The estlcam settings are the only ones to worry about.
You are showing feedrates that are too fast. You have them shown in mm/min, most of use use mm/sec to make it more clear. You are running at 10.5mm/s on the z axis, you can not move more that 8.5mm/s and should be cutting at 3mm/s. This is the cause of your random issues.