I have mounted several of the Dixie 3/4" tubes for some folks here. The scopes appear to be well made, clear looking, with a real fine crosshair, and look neat when on a period type gun.
The mounts are sort of funky, but servicable. Requires drilling and tapping 2, 6/48 holes for each base; no big deal. But adjusting the scope is tricky, due to the way the mounts are setup. All in all, not a bad deal though.
Good luck whatever you decide upon. Should look neat on a Roller! You might try asking over at the Single Shot Forum too. Lot's of knowledgable gentleman there.
http://www.assra.com/cgi-bin/yabb/yabb.pl
