This is a bit more thought provoking … Well worth Pauls recommendation of reading and planning ahead … Think what is happening 5 steps ahead … Took me a while to realise that gentle emery on inner legs was never going to get them sliding smoothly.
A weekend email to Paul with a photo brings back a quick response and good solid engineering advice on how and where I should file. 1 hour later and its sliding beautifully … Great care not to take too much off.
Prep of bobbins andinternal stops introduces gluing with dual compound loctite … Sticks like …. Well very strong ! wipe the excess so it doesnt seep into the legs and jam your carefully prepared inners.