Yeah, I suppose practice is the obvious. My set up is as crude as it comes with castors fixed to box section to give me the roll but is manually turned.
This may be a bit long winded but to get my point across it may be necessary :doh:
Prior to getting our MIG welder installed where I work, I would stick weld this dummy end bobbin into the 4” tube with a wall thickness of 1.5mm approx. Which wasn’t a problem.
The bobbin has to be set back...