[Richard Coutts-Smith]

Hi Niels
Champ front diff plug is located on the drivers side just in front of and above the torsion rod mounting bracket, on the side of the diff housing.(Same as the back but opposite side) Is this what you are after? As for the other I have not done that yet, although it is on the list for the back.
Have you got a workshop manual? They are available on CD via Ebay, although I got one from a guy here in Australia which is all the original stuff scanned on to PDF files and I recommend. Warning though, the manuals are nearly as complicated as the Champ itself.
Give us a yell if there is anything else I can do to help.
Rich.