I took a mossie 16 out with the two drop tanks. At some point I dropped just a single tank and the display error started. What happened was this: The gallon display for the fuel amount in the external tank would jump wildly. It started in the upper 80's after I dropped the first tank and would suddenly flip to be in the 60's. The switch back to the 80's. This went on until I kicked the second tank off then everything went back to normal. I took 4 screen shots but don't have any place (photobucket etc) to post them for review. Although I did mistakenly send them to Skuzzy so he might still have them.