Well... I agree, the Roga looks just like it. Has the foam wing, looks like a formed turtleback etc etc. But the dimensions are off. Metric measurements on mine are w/s-1530mm, l-1340mm. Couldn,t find any information on whether or not Roga made a smaller version.

The measurements on the D & L version agree with mine, but the wing is built up and the turtleback appears to be stick built.

Then again someone may have scratch built this one to for all I know. Whoever built it did a first class job of it, very nice work.