Hey sac doesn't sell a 20 cal neck/shoulder bushing for the 20 Dasher. I talked to them to see if they would custom make me one and they said they would at $75 per but I have to order 3 for them to do it. 4-8 month lead time since it would just go into their normal product schedule. I don't need 3 does anyone else want one or possibly two. If I do this I will also have a reamer for rent if that is what holds you up.