The only issue I had with the Bosch1617EVS is when the core is positioned at xmin or xmax, and therefore only 1 z axis motor is lifting everything. To avoid skipping steps I had to increase the z driver amps and install a fan to keep the drivers from overheating. Otherwise the Bosch router and lowrider3 works like a champ. I think the lr3/bosch would do great at milling aluminum. I will test aluminum when I have a chance. Currently building another lr3 with the same setup.
There’s another design for the Bosch toolmount: