I gotta help cut up what is supposed to be a BIG (we will see) tree tomorrow. I told Jack that I would put the 30" bar on the 660 just in case it really is that big. Noticed that the front nut was feeling mushy. I have wondered about that one before... Time to check it out. Stripped of coarse. Drill/tap/insert a M8 Helicoil. I will "try" and not crank that front nut to much, but it has to hold the thing together. And yea, I put some sealer on there as it goes directly into the oil tank... Most likely I will only be using the 064 with a 28" bar on it anyway. I'll get pics if this really is a big one!