I started to assemble my F-704 bulkhead on my -7 (this is the bulkhead that receives the spars from the wings), and I just unbagged the F704E and F main bulkhead members that were sent with the spars; I found both 3/4" bars on F-704F are loose on the web. All the monster rivets look good, but I can wiggle both bars and found they make a distinct "click" at the end of their travel. Caliper measurements show something like a 10 mil motion per bar.
Update: Sterling at Van's sez this is not normal and sent me a replacement set of F-704 parts (the gold anodized set). I'm returning the old to him