Yup what Adam said.

I'd also add that I'm in the process of doing the exact same thing, mine should maiden shortly. I'm painting and covering now.

I would add a few things to consider.

The plane should be a full 2 meters long, but only about 74-76 inches wingspan. It tracks and flies better like this, and snaps great. Wing area should be about 100 square inches per lb, so if you're shooting for 10 lbs, you'll need about 1000 square inches. Keep the root between 18" and 20", and play with the taper to the tips. Straight double tapers to straight trailing edges work well, no swept wings or straight leading edges. The airfoil should be about 10-12% with the maximum thickness between 33-40%. You can play with this a little.

Keep your stab area to about 23% to 25%, no more. The further forward you mount it, the less stable (but better snapping) it will be...and the further back you mount it, it can be smaller (closer to 23%.

Ther's a thousand other things to consider, but sometimes it's best just to do it and go from there.

And might I suggest keeping it LIGHT!!! Buy the best 4-6 lb wood you can afford, and weigh each and every single piece on a gram scale. You may want to save your best pieces for yoru second attempt; your first will usually need some tweaking.

Other than that, have fun and I promise, you'll really feel the reward when you do it yourself. Make sure you actually go compete with it and win too, that's the absolute best feeling in the world.

-Mike