Only problem is that you can not have both worlds. Either speed or torque. If it is setup for speed and you need to do something slow you may not have the torque to do it. If you set it up for torque then you will not have the speed. The reason Tormach has a two speed belt drive. If I absolutely had to I think that I could set it up for speed and deal with the low end torque since 90%+ of my work is at speed. Been thinking about belt drive. You would also have to figure out a way to lock the spindle for tool change out. Now I just select the lowest gear and all is well.
I have done a couple of things to fight the heat build up. They are on my photopage at:
RF-45 info and ideas To include a lower spindle bearing cooler and a gear head cooler.
Thomas