I just received today via FedEx my first bit of the Element Technica treasure trove of goodies and here is the plain and simple truth: Their dovetail fits better than the original euro plate that came with the tripod. I had decided after ordering my tripod from BJ at Custom Supply that I was going the ET route with the baseplate. BJ promptly let me return the euro plate for a refund–thanks BJ.
Then, today the ET 9" dovetail for my 1030HDS arrived and it locks down as solid as can be. Not a smidge of movement or slop whatsoever, rock solid. So, I'm going on record as saying Oconnor, Custom Supply and Element Technica are all great companies with fantastic products.
Thanks guys, keep up the good work!