Lear, Looks like you are doing a great job. I have built and flown many Staggerwings in the past. I have a Byron Staggerwing near completion. These models are with in inches of each other. One concern is your use of a snap on ball link for your air valve. I would change it out for a clevis that can be locked to keep it form comming off. If your servo set up gets a little out of wack, this could lead to the ball link being poped off. Belly landing is not fun. Course that was one of the selling points of the full scale Stagg. Beech had one belly in three times during a demonstration to prove that if the retracts were inoperative the plane could belly in with little to no damage on a grass strip. Retractable landing gear were not very common when this plane came out and pilots were afraid of them. Anyhow, can't wait to here how your first flight goes. If it is anything like my Staggs, the plane will be a floater on landings, and you will be surprized at how well they handle. I have flown two full size G model Staggerwing Beechs and can attest to there great handling. Got to love the Staggs.
Gary