Dator Rear Tank Capacity

[WoodlandSerenade]

Does anybody know the fuel capacity, and maybe a couple simple measurements of the dator rear tank?
I am trying to draw one up in CAD with just a couple of pictures and I'm getting somewhere in the 3 gallon range, but I felt that might be a little small, but I've honestly just been using visual proportions from the installation manual and a nice pic I found on the forums here.
As for now I have the sides at an approx 10.3 inches, with a flat-side length (lined in pic) of 9.3 inches.
I'll gladly upload the file if anybody wants it once I have it all sorted out.

[sledder670]

I would say 2-3 gallons. I have one with a crack I need to try and repair. Are you thinking of making one?

[WoodlandSerenade]

I have no intention to produce them in the relative future. I just wanted for somebody with the means to do so to have a nice mark-up to make their job a bit easier. That, and preservation of design. If somebody could make them in the future, I'm sure it'd be pretty tough if they didn't have an example to go off of.

[sledder670]

I've thought of making an aluminum one for mine. I can buy the threaded piece for the filler neck and weld it on. All you really see is the cap and filler neck and at least you would know you have enough gas for a 100 mile ride and not get some bad fuel and ruin a piston.