Why not pull each from its own vial into the same pin? Then you always know what's going in. I get wanting to use one vial, but for consistency I keep them apart, that's my routine. This morning I turned 7 pins into 4, and tonight 4 into 2. Tesa and Ipa, SS31 with TB500, MotsC with NAD, SLU-PP-332, bpc kpv ghk, and test.