I have one.
I don't have the plans and instruction booklet anymore, but i will check on the plane tonight. I remember that for the maiden flight the CG was at the exact position showed in the instruction booklet, but i changed it slightly forward. I did this because the plane need a long acceleration phase before the flight controls become totaly effective and with the cg at the recomanded position the plane was a little bit unstable at low speed.

That little bird fly like a dream with a reducted speed400, and if builded light, you may expect to gain altitude easily with engine cuttof in thermal ascendance.
My record 52 minuts flight......