getting more fuel in the tank?

[limax2]

WARNING WARNING WARNING
Well mind and vent your tank really well or have a fire extinguisher real handy as it's the petrol vapours that burns and not the actual liquid, vapours will still be present for ages after emptying your tank of fuel.

An old trick to do a quick tank repair at the race track was to run the van exhaust through the tank for a short while to clear the petrol vapours.