RV-8 Build. Ep 069. Fuel Tanks 16 - That Hippie Pilot Watch in HD on YouTube! Share on Facebook! It's my first time taking a look at the float-type fuel senders. On the left wing, I need to relocate the fuel sender to accommodate the flop tube for inverted fuel. In this work session, I determine the proper mounting location on the rear fuel tank baffle and start to make some bends in the sender's arm.