ggggary - I dont remeber a drill bit, but the last tip I remember (which may be similar to the drill bit) was by member Toghlot (spelling) who put a piece of 3mm flat bar in the u tip with the intention that the wings would get pushed together closer to the start of the wings instead of just crushing the u tip. I think that was a good tip because when I was squeezing the u tip in the vice you can see how it can have the effect of actually opening the wings. The further you can get away from the u bend (on the u tip) the more chance you have of closing up the wings. Maybe I dont have the nack.
Some ideas I've had are - put some dobs of weld on the wings, clean them up, to act as friction points/rub points - to make the wings thicker so they rub on the sides as well as the bottom of the groove. Squeeze the u tip in the vice and add a spot of weld to hold it in that squeezed posi. Make a full circle and join the ends with a spot of weld or a metal band or a piece of crushed small diameter tubing. Just ideas, just thinking.
Thanks for noticing.
