My apologies for not trusting email notices from this forum (as so many of them have been fake).
I'll need to read my original post again for the collar stop. brb
OK, I refreshed my memory.
i can not find a collar stop that will fit inside 3/8" tubing with the 3/16" ID its killing me. ive got all the other parts
Did you get the collars from Dubro? https://dubro.com/collections/collars/products/nickel-plated-dura-collars?variant=27880685319
I can believe that after all these years they may have changed the O.D. (outside dimension), did they? Can you gives us some photos and dimensions of your brass tube's I.D. (inside dimension) and the brand of collars you've tried?