Hi Renrut, I forgot to say, also very useful, is to get a syringes from any animal feed place / vet / chemist. Then place a bit of transparent tube on the end. This will help no end putting the oil in each gearbox, with out making too much of a mess. Get the biggest syringe you can. If you use it for all three oils, make sure you clean it out so as not to mix the oils. Use paper towel for this. Trust me it really isent a big job, as long as you know what you are looking at, hence the haynes manual.
Good luck.