You won't drop it if it's full, weighs a ton.
I drained my 300 by unscrewing the sender unit and slipping in a length of flexible pipe, it took a while but I managed to syphon the tank dry. Then I could drop it, still bloody heavy though, two person job.
Pipe will need to be pretty small, maybe 3/8"
THats because your a big strong tough guy .......and ees a weedPiece of **** to drop the tank, I did it by myeslf on my back. Mine had previously been run on allsorts of **** and was full of nasty goo and gritty stuff. However if you pull up the boot carpet and sound deadening you will see an inspection plate which you can remove allowing you to take the sender out of the tank which gives you a nice big hole to put a syphon pipe in and even your arm if you so wish....