Nice job, and these very laid-back electroforged frames are among the few that handle really well with pulled-back bars, shorty stem or any combination thereof.

Can you notice any improvement in the larger frame's longer top tube? I mean as far as climbing whatever hills you might have to deal with?

I once tried the 26" frame Varsity to test the benefit of a longer top tube, but the bike was actually just to tall for my albeit leggy 5'9" height.

I actually have a Collegiate on which the top tube was lowered by a welder who I traded a bike to. He threw the Collegiate in for free, and it actually ended up being creditably sturdy. All the welding was done old-school, with a torch.

As for your custom seat posts, were these made because of the difficulty in finding a seat clamp with the 1/2" clamping and for a saddle with round rails?
I'm considering fabbing a seatpost for a Huffy frame that has a seatpost diameter a little smaller than a Schwinn.