Impressive operation, Dan! I have an 8UAF, so I can attempt to copy your configuration. How soon do you think it will be before your ready for a flight test? My only comment would be whether or not you could, or should consider, adding a delayed response(slowing) time to the LEF deployment/retraction. Of course, with a proven airplane like yours, it should be easier to test the effects in the air. I don't know of much testing out there on the effects of the LEF's to know what one can expect. This summer, I placed some pieces of thread at various places along the chord and used a floor fan to see what they (the threads) would do. With the slow airflow of a fan passing over and under the wing, there was quite a noticeable change in the pattern of the flow. How that would translate to actual flying I don't know, but I think the created lift would be quite noticeable. As I recall, the airflow shifted back which I suspect would create some pitching. I thought about cranking up the leafblower to test the flow but never did. BTW, what model servo are using on the LEF's.