Hi
I too own a Einhell mini mill
i have done the belt-drive myselft, not too hard to do, i based my desing in the LMS common design
but have to move the circuit box a little to make room for the bottom plate, doing this there is no more room for the torsion spring arm so I done the air spring mod simultaneously
I dont remember well..the slower speed was arround 2000 RPM and the higher 4000 RMPS
The belt i bougth from LMS is a Truflex 0130, the angle cant remember either, but i measure it directly from the belt in my hand and a protactor jajaja :
now im planning to change the beltdrive for some other drive design that allow me to have more torque, reducing the spindle speed to ranges like hi-torque 0-500 rpm, normal-torque 0-1000 rpm and high-speed 0-2000 rpms
but thats ir more future from now
anyway Corvus how long habe you owned the Einhell mini mill?
i wish to comparate my mini mill with some other of the same kind, to see if the problems that have showed mine are common or just i got bad luck jajaj ;D
Saludos