I like it with the stock tank. I assume blacSOHC has already worked out his suspension mount points, geometry and adequate support for the new subframe.
Yes, I took measurements from the stem to the stock mounting points for the rear springs and plan on getting it pretty much exactly the same. I bought the mounting kit from Cognito so it should be a clean and straightforward weld in solve.
On the support bars, I am going back and forth on whether I want to recreate them in the factory spot (creating the large 'triangle' area) or mount them higher up on the bar behind the motor creating a shallower/sleeker triangle. If that makes any sense...
I will mock up some photoshops soon