[secant0give]

It won't be legal for EF1 because they have to be made of Balsa. The only things that can be composite on an EF1 are non structural items like cowls and canopies. This looks like an all composite machine.

I don't think it will fit into a class for racing here, probably make a good plane to practice with tho'.
It might fit a class they race over seas. There are a bunch of pylon racers that don't seem to fit any class. There are the 400 type machines like the Sokol, the Rifle, and a couple from HK as well but no one races them. That's why I reckon a modern much faster version of this class would be fun, to race the Dynamite in. There were 3 such models airworthy until Saturday

Here are some real screamers F5D machines, It may take some practice to be able to keep one on the course tho
http://www.skipmillermodels.com/Pylon_F5D_s/89.htm

here is another nice one
http://www.soaringusa.com/Swist-F5D.html