FYI- I have the adjuster tool/hex head idle screws and I don't see it as that big of an advantage since you still need a Promax base plate to get to the back carburetor. The screws are much less likely to strip out again though.
I just read through his write up here:
http://www.ebay.com/itm/261931901538 and he doesn't mention having to switch to a Promax baseplate so that his tool/idle screws work. Are we talking about the same tool/idle screws? I would like the ability to adjust the outboards w/o dismounting.