Houston,the monstrous holes have been patched.
It was a tedious job but worth it. These engines will be a major focal point on this plane. So it was important to me that the holes not look like a whoopsy.
On version 1 the upper edge of the pocket was hallow. Left it that way cause of the complex shape and it really would not be seen.
But since I was wrapping the holes with 1/8 balsa I needed a solid wall (roof) to glue to.
First up was to fit a balsa block up in the pocket. Then I filled the remainder with a mixture of epoxy and micro balloons.
Then I wrapped each pocket with 1/8 inch balsa. The balsa was glued in place with slow cure epoxy. Once that was set it was sanded flush with cowl.
Once I was satisfied with the fit. The balsa ledge was sanded beneath the surface and then a slurry of epoxy and micro balloons was smeared over the balsa ledge and cowl edge.
Then it was sanded to the outer contour.
Bellow is version 1 on the left version 2 on the right.
Kevin