OK I'm getting a bit excited. I might be able to convert this gun? I'm glad I've seen this before I pop off to my barrel man. This page here? http://www.briley.com/companiondrop-intubesets.aspx is this what we are talking about. Do we think it simple enough for me to put these in myself. Do the 28 guage tubes just slide into my 20 bore Clarke as shown in the video on the Briley site?

Cheers
T