Okay, thanks to you I understand the difference between Eastwood and Fedhill instruments. But you mentioned that Eastwood releases the clamp faster. What clamps do you use? Maybe you prefer a particular company? I've been using these https://www.sandfieldengineering.com/toggle-clamps/ for quite some time, but I see your desire for experimentation and I'm sure you had something to compare. The above option works for me, but I would also like to try another manufacturer's product to know what alternatives there are.