Hi, thanks for that. I think the in-house designed stuff is very good - although I've no experience of the Diesels to compare against. The problem I think with the 3F and a number of the other steam outline kits is their provenance. My understanding is that the 3F was originally from Chowbent Engineering which may account for some of the issues I found. I have an eponymous rivet tool. Actually it was my Dad's design and sold under the Cherry Scale Models banner. The Reynalds Rivet tool is very nice, at one point Lee Marsh was going to be making a new batch, advertised as BRM (Beeson/Reynalds/Marsh). I put my name down for one but heard nothing more and with his expanding loco building empire it's gone quiet on the BRM rivet tool.