Wow, I didn't know that Simple Green would remove congealed swarf. I just finished rejuvinating a 74 Series one and I ended up disassembling it, moving it outside piece by piece and using a wire brush and pressure washer on all the parts. Talking about a messy, time consuming job!!!
Also, I used by shop vac to vacuum all the chips out of the knee. How in the heck does 50# of chips lodge inside the knee when the metal chip guards (slides) are in place???? I think the thing was 500# lighter after the cleanup though and Molly never looked beter!!!
Good Luck
Bill from Spartanburg
billyjack
Helicopter def. = Bunch of spare parts flying in close formation! USAF 1974 ;>)