Thanks Stretch. Yeh.... there are two lengths of pin. I use a wrap around rest so went for a slightly longer button. Also means I can shorten the others on my lathe if I ever need to.
Now to go down the club and check it out.... oh wait 
You'll love the beiter, no more hassle trying to find the allen key, easy adjustment between shots if needed. I was going to say that with your engineering skills, it should be child's play for you to make a new and improved custom collar.I may pop into the workshop and make a spare collar although will only need it if I swap risers. I was not unhappy with the Shibuya DX but saw the Beiter for £71 on a Black Friday sale and thought what the hell! And hopefully the new Brexit deal means I won't be looking at an increase in steel prices this year
Had a Beiter button but wanted a second button for indoor fat arrows so I could change buttons rather than change setup so bought a Jet EXE magnetic button. Now sold the Beiter and bought a second Jet. Beautifully progressive "spring", no silly plastic spanner necessary and more consistent results. Don't know why they aren't more popular at reasonable price compared to a Beiter.
We found that when turning in a button with a rubber ring sometimes it can differ up to half a turn. We advice to tear out the rubber ring and use a spanner to "lock" the button.
Never had a problem. The rubber ring is such that when tightened properly then adjustment ring is almost touching the rest/riser. It would be just as easy to not tighten the Beiter properly as you are always worried about snapping the "silly plastic spanner"
but in an item costing as much as they do why do they have a plastic spanner in the first place!
Not sure why there is a spanner. Seems to do up just as well as my Shibi without one.
To stop you over tightening the button, archers are notorious for over tightening screws and rounding off heads the benefit of the lockdown a few weeks respite from fixing these types of problems
- better to damage a £2 spanner than a £95 button.
