What is the best way to vacuum debris out of the strakes?
Most tank contamination occurs when drilling the holes in the top strake skins for the filler caps. If you just poke your shop vacuum hose in the tank, the air that gets sucked out gets replaced by air rushing into the tank. The air rushing into the tank will disperse the debris away from the vacuum hose and deposit it throughout the tank, leaving you with the mistaken impression that the debris has been vacuumed up. This is why the plans say to duct tape a small diameter hose (vinyl tubing) to the end of the shop vac to reduce the quantity of air and the resultant small tornado inside the tank. Do not put a rag around the vacuum hose to seal off the tank opening—implosion is just as lethal to your tank as explosion.
