There are a lot of bugs zipping around. And, there have been several mods by some creative individuls that seem to make a good thing even better. After flying a stock Bug, I built Colin B's Carbon D-Bug design that withstands aggressive discus launches to amazing heights for a 4 ounce airplane. Both Bugs perform well for what they are. The vtail feels more maneuverable for the slope, but the cruciform tail launches arrow-straight and MUCH higher.
Check out
http://groups.yahoo.com/group/BugHLG/ which is the central repository of bug builders/flyers. You'll see lace wings, stretched wings, carbon fuses, and more.
The attached picture shows my cruciform tail bug with carbon fuselage and right wingtip launching peg. Behind is a stock V-tail Bug.
-PJ