Just coming in new to this & read through the whole thread, so I havent any ideas on how to solve yet, but I have a bit of experiance moving tanks and fillers on the other kits I have built.
The way to look at it is imagine if your tank leaked & someone set fire to the resultant pool of petrol. If your method of shielding keeps the fuel away from you sat belted up in your car then I assume its good enough to pass. Therefore anything in or around the passenger compartment has to be totally sealed to prevent the flames/liquid from getiing to you. If the tank is in the engine bay then potentially it doesnt need that someone to set fire to it, it (or the vapours) could do it all on its own!
Rules like this seem pretty sensible, as does having the filler away from the engine bay (I wouldnt like to be stood next to the car after accidentally spillijng fuel allover a hot engine!
Having said that im a bit gutted I cant have the cool looking extinguisher/s on the back of the car.
Hmmm............ time for me to do some thinking!! Oh BTW Im a tight git too, & wouldnt pay for one of those behind seat tanks when they were allowed, so any solution for me has to be cheap!!
Im not sure how the tank in the front effectively being the front bumper complies with the protection from front impact requirement??
