Spike, Thanks very much for your response. I guess it would be better to have my own web site to post pictures I am currently using a commercial site on a 14 day trial. I have posted a couple more pictures I am using a 3/8 x 100’x # 40 cr Countersink I have used both single and triple flute. The d...

I am practicing before I rivet the skins to the Longerons. The problem I have is the .002 +or= gap between the skin and the angle aluminum. Is this normal? It appears to me that the skin should be flush with the longeron. I use a DRDT-2 C Frame and I have used both Cleave land and Avery dimple dies....