Very useful info Nick.
Looking at my full length pic it looks like the single notch I have (around 21 1/4 inches) would relate to High or full level. So as long as I top up to that level I'm probably safe. I hope!
The bit about the hinged flap explains why, when I was poking the welding rod down, I had to modify it with a simple bend. I thought it was hitting the joint where the tube joined the engine/sump.
If I ever have cause to take the sump off I'll not be too worried when I find a lump of plastic......
Thanks all, Rob.
