Roderich, thanks for the photos - can you talk us through what you changed? Did you do the modification? And is it 'just' (I'm sure it was a lot of work) a mod from rubber pipes to metal? Who actually created the new part?
You need to be more specific for the non-technical members... i.e. ME!
Simon,
'Did YOU do the modifications?' You made my day

I'll try to explain as good as I can what my Morgan agent did:
It was a change from the big rubber pipe to the metal one and a new filler cap. From outside it looks like the old one turned 60 degrees to the left. As I understood the new one is shorter to allow a better flow. Before there was a 90 degree angle that was one reason for the problems. The old pipe and the filler cap had to be removed. One pipe was cut and the new parts were fitted. I took about two to three hours.
All parts came from Malvern. I presume MMC produced them.
Btw, Julf mentioned some days ago it looked like a sculpture and I answered I had ordered a second one and a marble stone...
BR, Roderich