Ahh that makes sense. I've got Chinese machines, a G0602 lathe and an X2 G8689 mill, so relatively light. I only cut metal on them so tolerances are very important. Then again, maybe I've never attributed my lost tolerances to this issue! I always push escape to cancel, or trip the limit switch on my lathe. Humm, maybe it does lose a few thou, be a fun test one day, especially during rapids.