Regards the crashing, I was referring to the usual way people do the rapid first part of a homing routine, they usually send the machine to a distance just before the machine zero then do the homing from there. Problem with that way is if the axis is not where Mach thinks it to be then it could be crash time
Setting a faster % is not really a dangerous thing if you use NC switches as any problem and homing wont work properly. As to doing a two speed homing like RC mentione, yes that could be done but whether it is actually needed I dont know. I would imagine if you do the homing at a speed, no matter if its 10% or 80% as long as you always use that speed there should be no differences day to day.
Hood