That's looking very nice. I thought about putting flaps on mine just for fun and would do it exactly as you have. I also am thinking of making the Stabilators independent to act as ailerons too. I would like to hear about how yours test flies before I try mine.
My fan FODed after only 4 flights and the motor bearings became loose in the hub after 5 flights so beware. Otherwise it's a very fun ship! I can only imagine how slow it will fly with your mods.......
Brad