Yar, your just a better mechanic than me!! I've got an almost new one...different name but the same as you posted and I hate it. Its just not "dependable" to me for each flare I do. I've practiced a lot, learned a trick or two but its still a PITA.
...or its just me!
I'll second that, and it's not just you.
I've got, well I had, 3 sets of those kind, 2 OTC brand, and a reasonably nice/expensive Imperial. Just gave away one of the OTC sets, never took the shrink wrap off the second, and as much as I don't like the Imperial I paid to much for it to just give it away...
Quite pleased with the BrakeQuip set I now use, a perfect flare every time so far, a pleasure to use.
Grigg