brenzo... sounds like you have a good plan... the words Micro servo's bother's me... if your talking something like the 3101's that garys used or say HS-81MG's then fine BUT if your thinking 3107's HS-55/50's or the like then NO... the surfaces would destroy them in the first flight.
Canopy is up to you... I used it and it does help a bit in flight IMHO... one more point to reference right side up from up side down
With a 15 the balsa main spar is fine... I used spruce(IIRC... it was hard wood) since I went .25 on a pipe. Beef up F-2(IIRC) the main former that the wing dowel pins go into with some tri stock..two small pieces give LOT's more glue surface. sand the heck out of the wing tip's!
John