I recently switched from cable to an OTA setup for locals, but I've been reading about AMC 21 and would love to get Sprout back for the kids, and more channels are always good. I don't want to buy a new dish, but I have an old Superdish with the bracket and LNBs still intact. Does anyone know if I swap the 121 for the correct LNB, is the Superdish large enough to pull in AMC 21? All the posts I've read say 30" or larger, but does oblong count? I'd rather have some idea before I invest in a receiver since that's the only satellite I'm interested in. Thanks for any advice/input.