Tanks Prepared for Disassembly

I got the left tank 100% complete for disassembly and dimpling. I got the right tank to the same spot also but since I am missing the J channel I’ll have to leave it where it is at until I can get that done. Luckily they shipped it today so fingers crossed it arrives before the weekend. But I got all of the zee brackets finished, primed and nutplates riveted. I also got the countersinking done on the rear rows of rivets. I feel I’m going to have to countersink the T-1005-L&R brackets because they are super thick, but it doesn’t say so. I’m betting they are expecting us to know when it is needed by now so I plan on reviewing what other’s did to that area. I don’t know if I should countersink the skin and leave the brackets alone or counter sink the brackets and dimple the skins.