Paul-
Hard to tell from the pics and mayhaps it was just gravity since the boat was hanging on the wall but it appears the sheeting angle on this sail is considerably different from a "stock" T sail. This makes sense since you commented on the shorter foot- However- how does this affect your mast rotation? Especially in light air- Seems your foot would always be flat regardless of the outhaul unless you now utilize an inhaul to compensate for this?
Was this sail constructed as a cat rig, sloop or "both"?

Thanks!

Kirt