this should work just fine. Keep the build straight and light. Plan the build ahead of time to be light. Use light (contest) balsa where ever the stress will allow. Fixed gear are lighter than retracts (no gear and no servo). Tail dragger should be lighter than trike gear.

suggestions:
1. Build your former out of 2 pieces of cross-grained 1/16 contest balsa. Use little glue to bond the pieces (like gorilla glue)
2. Build you own firewall (F1). Use 3 pieces 2 - 1/16s balsa bonded to a middle layer of 1/8 very light ply.
3. Use lightening holes even on F1.
4. Use good servos and check the weight. You could use mid size servos as they should have enough power and be lighter. Servo centering is pretty important to a consistent trim. Personally I would use coreless servos.
5. If I remember right the RCV is a geared motor; so it can turn a bigger prop with less RPM. If it is, you may have a problem with prop clearance if you use the gear height from the plan. Double check and see you if you are going to need to add an inch or 2 to the main gear.