Sorry Olly, no idea what make the Sash Clamps are I have some Records which are ok, but was told by Dom who used to post here that the best value for money were, maybe an own brand, sold by Tilgear, though I think they were Aluminium. I'll find out if you want? I personally won't make anything ever again in Elm unless I'm paid very well for the added stress! The Burr veneer is some of the nicest I've seen though and would look ok when used with some other more stable woods. The photo's don't really show the colours and details. Thanks for looking and the comments, ditto to everyone else who has too!