Lols, sorry...

I cant see it, but there are a few variances in bases.

Differences included overall height, angle height, width and metal guage.

They are generally quite small though.

Axle mounts have the largest variances, but you would think with the same jigs they would all be good.

Holes for the engine can also be offset or not inline.

I have an early 2 that the apprentice must have done, as the front axles mounts are offset nearly 20mm to that of the rear, and they are also welded on a 15� angle!

Its possible one base is a model 1 especially if it has an early serial no...

So with all that said, one could definitely be higher, only a measurement will tell.