Definitely heating the backplate is helping but I get solid results only with my bigger vise, not expennsive one
Ps
@The Beagle Around 40€on amazon.fr
Both clamps are kept parallel by frame, and this helps me a lot to keep barrel flat against backplate
Tryied some more and got the rosin dripping like seen in video, one fat tear even if on my scale still .11 so maybe the scale isn’t very accurate at the very bottom (less than 10€)
With the small, more handy and portable vise (similar but cheaper to the one
@Nattybushdoctor recommend) I have often the backplate problems, the barrel being pushed hard back and the material coming out from the press wasting the attempt. With the one in picture this never happened
Also: it is a simple task but few steps must be followed in order because when you are at half time heating and you realise you forgot to put the spacer in place it is very annoying and frustrating, so planning/order and oven gloves are very welcome IME
Edit: had a backplate in my order: a squared thick magnetic steel. i use neodymium magnet to keep it on one clamp so one thing less to handle