Hey Guys....Looking for HELP. I have the same problem with my recently completed CH750 STOL as far as unequal fuel flow from the right and left tanks. SCARY!!! I flew about 40 minutes yesterday, starting with even tank levels of about 8.5 gallons in each, and landed with 4 gallons in the left and 8 gallons in the right. I have the vented caps that were supplied with my kit. Also noticed 100LL blue stain on my new vinyl covered right wing. A bummer. I plumbed both tanks straight across in the frame member above and behind the seats, with a "T" at the pilot side vertical door frame member and going down to the shutoff valve supplied, located at my left shoulder. From there I go to the gasolator, an inline filter and electric fuel boost pump located in the floor behind the pilot seat? Free flow from each tank is 1 gallon every 2.5 minutes, more than enough to feed my 0-320. If the left tank runs dry will I be sucking air, even if I have time to turn on the boost pump? I am waiting on an answer from Sebastian and Roger.