Was ready to get the rear bulkhead cover drilled in place and then finally the instructions say to rivet the bottom of the center vertical support to the battery ribs. There are four rivets and they are very hard to get to. I have no idea why Van's doesn't have you do these sooner. I had to pull out the battery tray and elevator belcrank mount. Wouldn't be too bad except for the PITA AN bolts that sit below the lip of the battery tray. And then I stripped the head of one of the #8 screws so badly I had to get the dremel out to cut a flat head slot into it. Finally got all that apart with hopes that I'd be able to get the squeezer on the rivets. Got two of them but not the other two. They're tricky and I'm not going to bother trying to get them solo. 2/6: got the wife to help me buck those last two rivets. They came out fine with a partner and a double offset rivet set. Held off on putting the battery tray back together as I'm going to take the opportunity to install a nice grounding post. Ordered some hardware from ACS. Cleco'd the rear bulkhead in place and match drilled all the remaining holes. That's as far as I can go on this section until I get the AC return air holes cut in the bulkhead.