I had huge problems fuelling my Aero +8. Seasons and staff rotas would change whilst I was trying to fill it. The fuel gauge was also all over the place - from full to empty reading out whilst sat at traffic lights. Pretty hopeless for a brand new and costly car.
So I bit the bullet and had the Morgan factory come up with a solution - which they did. It was new piping and venting - not a cheap fix. However it's been transformative - it's now like filling a normal car... full on trigger (if you dare) is possible. The fuel gauge is more accurate as a result.