[JohnForde]

I have removed the 22" extension to 6'. I need to get numbers at 4' first.

My most recent effort addressed 2 areas: corner seal and rough cuff.

The corner is sealed with coroplast. I think successfully.

I tried to smooth the cuff with 1/8" HDPE. I taped the leading edge and screwed the rear. Unfortunately with a little sunshine the black HDPE expanded. This led to no improvement in cuff smoothness.

I saw no reduction in drag.

Next week I will begin pressure testing. Thanks to Vanm455 for sending me pucks.

My plan is to rebuild the cuff's 16" plywood by reducing its angle from 11 to 6 degrees. Then adding the doors at 10 degrees. I will; also flatten the top to 10 or less. I will seal against leakage then tuft & pressure test.

Thanks to everyone for your input.

JF