WriteON
Member
What are you using to square off the blanks. Is there a specific sleeve used over the barrel trimming shaft?
Sleeves can be made to fit any tube. No need to get separate shafts for each tube size. Just glue a 7mm tube into a piece of wood or other material and turn it down so it just slips inside the tube of the kit being made. Although there are many many kits several kits use the same size tubes and you will soon have enough of these sleeves to work with the kits that you make. This picture may help.
Do a good turn daily!
Don