40" is long enough to be a comfortable shooting platform for finger release according to most finger shooters and I concur. How long of an ATA are you looking for?
I have 3 Shadowcats, 2 for shooting right handed and 1 for left handed. I would love for them to be about 45-48" ATA. If they were and still had the same bracehight they would be the most awsome finger bows on the planet.
Martin Shadowcats- Harvest Time Archery HT-4's
Gator Feathers by Gator vanes...www.gatorvanes.com
I shoot fingers non-sights...is there really any other way.