I have a couple of orange end bell motors which otherwise look identical to the Piranah, on the tacho at 12v, they are 23.3 and 23.180. Are they the same as the Piranah or older Slot-It motors. Both spare Piranah motors I have are 23k, one of which has a black and the other a white, endbells. Still trying to decide between 20k Shark (20.150) or one of the afore mentioned motors for the Grp 5 Proxy.