I know the Rug Renovator was introduced with the Kirby DS50, but was wondering, did it run the DS50 and DS80 on the high speed?  I know that the earlier Kirby models had a 4 amp motor, and the DS50 and DS80 were 4 amps on the low speed, and 5 amps on the high speed.  The reason I ask is because the Classic had a 5 amp motor on the low speed and a 6 amp motor on high, and the RR ran in normal (low speed) on this model.  I was in a conversation with another member about when the Rug Renovator was introduced, and can't figure out why they didn't release it on earlier models, unless they felt the smaller motors couldn't handle it.