Our flip up floor will also incorporate a hand rail that is usable when locked in the up position and just sits under the floor in that big cavern when it's down. I'm thinking it may need to flip down and then have a side piece that folds out towards the driver in order to fill the entire gap and avoid any falls into the cavern.
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We've done so much, for so long, with so little, we now do the impossible, overnight, with nothing. US Marines -- 6531, 3521. . . .Ret ASE brakes & elect. Ret (auto and aviation mech). Extra Class HAM, NAUI/PADI OpenWater diver