the novakons are already running on the drive
they are just not optimal is all - though i have NOT attached them to the machine yet. it may turn out they work rather fine. another reason to replace though is seals... they got a bit of the heat treatment and are a tad grindy :x
oh, the hv342/1 is about $100 more than an equivelant lin motor. weather thats just markup, or those motors are 'better", i dont know.