Even with the "Ukrainian Tire" (Canadian Tire) made in China - Dremel copy - it is not a pleasant experience.
I agree with Dave, start a build thread to get some help. Actually at home I have some photos from the Koas 40 build in an old issue of RCM. It's similar to the Utter Choas build. I'll scan and post those after.
ORIGINAL: rainedave
ORIGINAL: Jim_Purcha
It was a b*tch to have to carve out a rectangular slot for the aileron servo into the two center ribs and the center block after fibreglassing the wing.
That's what Dremel tool plunge router bits are for.
Tape a piece of ply with a rectangular opening the size of the servo on the center section of the wing and route away.
Almost all the Bridi Kaos designs are built the same way. Usually a thick slab fuselage top which is pinned down on the board; the fuselage is then built upside down onto the slab top.
As Jim said, a wing jig (the Great Planes jig is about $19) is great for building the symmetrical wing halves.
They are very straightforward, but if you start a build thread people here can guide you through it.
David