Can you tell me how your friends change to the Pro's Pro Automatic release string/base clamps you have pictured above went and how he likes them? I have a Eagnas 910 Combo with a broke clamp as well. I've been using floating clamps to get by but I really hate the inconsistency I'm getting since they are cheap clamps too. I was thinking about doing the upgrade you have listed but it's still a good chunk to put down (160).
Sure beats buying a new machine though.