been through all those hassles
I now use a monster tube , but had the same prob as you with homemade jars.
the best is---- put the cock in the jar as well- BUT first bandage it up tightish with about 2-3 foot of about 3" wide pharmacy type bandage ,chuck a couple of elastic bands[not overly tight ,just to stop unravelling] over it & your cock will not enlarge trust me , no more pulling in cause its in ,
i roll it up 1st [save's having bandages all over the place]--then roll it around & around even over the head [nb. once or twice from your view to the arse direction] thats stops pulling from that direction also
all the best
Problems Pumping just my Balls
Moderator: bigray57