Prop rubbing on fuel tank

[Green]

Just changed the tank from a 63l to a 55l and taken it down the road, driving lightly it's fine but seems the prop is catching under acceleration. Apart from the tank and props donut nothing has been changed, any ideas what might have cause it and how to fix without taking the whole freaking thing apart again.

[Brianmoooore]

Prop. should be well clear of the tank! Check that the tank is right up in place (large washers under the bolt heads in place?) then turn your attention to the diff. rear mount and the subframe bushes.