I am not sure. Is there a place to do this other than the general feed rate override on the main Mach control screen ? I cannot find anything labeled rapid feed rate override. I did discover in trying to make sure I had main screen override set at 100 % and then running a program that initially the rapids will run at about 10, but if I stop the execution and then start it again it will jump up to 50 or 100 and then if I stop it and start again it goes back to about 10 ?