I believe El cerito Honda by richmond has a flush machine. It's not bad to use them. I've done it to many Honda's and never had a problem. It removes 98% of the old ATF. It will not hurt the tranny as long as it has no pressure. The one we have basically taps into the cooler hoses going to the rad. from the transmission and slowly replaces the old oil with new oil. It has no pump it simply lets the transmissions pump do the work (the car must be running in neutral or park). I have never even seen the older style pressure type flushers as they have been frazed out.