I made one CCH (cut carry handle) rear sight and it works great. I just got another carry handle from a friend for free, but it has the "8/3" elevation wheel, not the "6/3". Can I just swap out elevation wheels and have it work OK on a carbine, or is the entire carry handle assembly different dimensions between a carbine carry handle and a rifle carry handle?  right now my elevation is WAAAY off at 100 yards, running out of FSB adjustment.