Greetings:  I’m building a slow build ES (Kit # 11), and just learned that the stock 75 gallon fuel capacity can be enlarged to around 90 gallons.  Luckily I’m at the stage where I can add a bay without difficulty.  I’ve checked with Lancair, and am awaiting some documentation on how to do that, but wanted to check here to see how others have accomplished the modification.  My the way, this is my first post, but surely not the last.