Wow, Benzmac -
Sounds like a nifty trick but it's all Latin to me. It will be easier for me to digest when I dive in there have the whole thing in front of me.
Just one more question - the Parts Shop lists two wrenches, one of which is for the 617 engine (615 589 ---). The other one (616 589 ---) is for which cars ?
Thanks for the tip.