I repaired the cracked weld in the oil tank an hour ago, it isn´t very fun to tig weld on an uncleaned oil tank but it turned out pretty ok.
With the tank welded and back in the frame I could fit the gearbox and start figuring out how to solve the drain.
You can see one of the two hose connections at the bottom of the gearbox that I will use, a short length of steel tube will be soldered to them inside the gearbox to get enough oil sump height for oil to reach the output bearings.
Here are the two matching hose fittings made in aluminum that I will weld to the top of the oil tank, they will act both as a vent line for the oil tank (will fit a large breather to the gearbox top) and of course as the drain for the oil injected into the bearings and gear mesh.
I will need to buy some 17mm ID hose before I can find the right position of the tank fittings and weld them in place.
As always I put a new layer of coating on the tail fairing plug, not much left to do on it now before it is time to make the mold for the real fairing.
Cheers!
/Anders