they would be REALLY short, and since the rear end can pivot as well, i wouldnt suggest it.
as far as being something else to tune, the rev. 3 and the carpet knife can both adjust the rear pod in relation to the rest of the chassis, but the way it is done is different. the CRC is done by adjusting the screws at the pivot, the speedmerchant does it by the links, which allows it to be alot more precise, and also less likely to re-adjust by itself, thus making it more consistant.