Sight in the 1000 with the DP dual that you are putting in the 129 slot. Just use the 129 for the bird you peak off of. No voltage issues or switching issues that way. Besides, 129 comes in with a low signal anyway, so best to max it as much as possible, even if it costs a few points on 119 or 110.
This is CABL.com posting #183282. Tiny Link: cabl.co/mVQk