Ericson 29 fuel tank

[charlierusty123]

I was wondering if anyone has an accurate guage of the amount of fuel used in the E29 tank by taking a measure of inches down from full. The tank is sloped so if is quite difficult to guage how much is left in the tank. I know, from a friend, that someone has done this calculation for the Tartan 30 tank - just wondering if anyone has done it for the E29 models.

Thanks,
Leigh