We will be building the track bike with Hellenic stays... will probably implement an oval top tube and down -tube to further increase the lateral stiffness as the rider, although smaller, can lay down some insane amounts of frame bending power.

The benefit with the Hellenic stay is that is closes the rear triangle and a smaller triangle is theoretically a stiffer triangle... when GT adopted this as a standard for their bikes they knew what they were doing and when you combined that with the oversized tubing on their mountain bikes you got a really decent frame. GT really overbuilt every frame they ever produced.

Their "Triple Triangle" also set their frames apart from the rest even though this design is almost as old as the safety bicycle.

If you find a nice GT I would not pass on it... they are really well made frames... and overbuilt in most cases.