I do indeed have a spare Diff here, and a few other parts, some have been promised to someone else, but have not heard from him in quite some time, so maybe they will go to you If I can't get hold of him (I think I have the control lever too)
I will pop up some diagrams of those drive gears, from memory they are not interchangeable with the drive gears of the 550.
If you can get a full list together of what you don't have (once I have given you the diagrams of coarse) that would be really good, as i can see how much of it I can get together for you.
