One thing I don't like about the Tiny is that, due to its small wing area, you need to build it light to get it to fly well. This means you need to use contest grade balsa, which is fragile. On my first landing of my Tiny, I hit a wingtip which broke every rib in that side of the wing. Ouch.
Perhaps you could build it with an extra wing bay and use 8# balsa instead. I was going to try that but I got sidetracked getting the DuskStik ready to kit.
The Tiny was quite easy to scratch build but I wouldn't recommend the V Tail. A conventional tail seems to be easier to set up.
Bleriot, do you think the Gnat would be tougher and does it use heavier balsa?