Between pages A-C-0040 and A-C-0041 the gusset plates that join ASS-003 and ASS-004 to the cabin frame suddently appear with no reference to drill holes or rivets, but thanks to other builds pages I was able to quickly determine what had to be done. About 54 drill holes and rivets along with scrubbing and priming of the parts. The cabin now feels very sturdy. Xin was very helpful putting all the clecos in before riveting. On to the firewall!