I have the paint wore off a elcheapo 15-45x spotting scope. I use it 99% of the time on mid setting, guessing that's about 30x. The main prob with 100% of the spotters I have seen is the tripod is too light. I took my tripod and lined the legs with lead solder( non flux core) and duct taped over them then. Now my scope is 100% solid under all shooting conditions.

Another thing Ibought, which I wouldnt trade for all the tea in China is a Cabela's window mount for the spottign scope. This thing is invaluable when cruising dirt roads and pre season scouting. And I still dont ned to go over 30x.