Why not just do 4ml Synthetine and 4ml of Syntheselen as seperate injections?
There is nothing wrong with what you did but there isn't really any advantage either.
Yeah, that's what I would have done, but I only had one empty/sterile vial to transfer to. The bottles from Synthetek don't have a rubber stopper, and I just don't feel comfortable leaving a water based injectable preparation in a vial with a hole in the top, too much chance for contamination and rather play it safe. So I mixed them together in the same vial, just wanted to be sure it was not a problem.
Post a link to that thread if you can still find it.