Gerry got the flap-gaps squared away. You can see them held in the down position using blue tape while adjacent areas were protected by tape as well. ( The L.E. of the flaps were also coated w/ Vaseline over that tape as a mold release agent. The hinges all got Vaselined knuckles which were then heated on high with a hairdryer to wick everything into the knuckle. Worked like a charm.)
The shot with the X-Acto knife was merely to show the excess bondo being surgically cut away within 5 min. after curing. Cutting it away at this stage saves a lot of time sanding it later and the results of this cutting are much neater. Once all tape was lifted off and everything had cured hard, the Bondo gap was blade-scraped, leaving everything smooth without risking further sanding to undermine adjacent wing skin bottoms in the immediate vicinity. Photos don't show the silver painted flap bays afterward. It's all ready to be glued in place.