I've got the Mastercool and the set of 37* dies as well. It started leaking a little after a dozen or so uses... I didn't get around to calling until I opened the case to a puddle one day and of course it was out of warranty by then.
It does nice flares but my biggest gripe is that when doing brake lines it ovals the lines where the teeth of the die grab so I end up having to put it back in 90* off to round it again so the nut or tube sleeve will slide all the way down to the flare. Hate to say it but most of the time I grab the old manual flaring tools.
|