hey everyone ive had a 650 flat tank in my van since ive started but it was a right ball ache so i tried turning it around to how it should be but it doesnt fit by like 2cm so im toying with the idea of a 1000 ibc tank in the back, the van is a renault trafic 1996 swb low top. it will fit fine but after reading all the comments for and against i cant make my mind up, simple thing is i cant afford to buy another tank so i want to get one of these, i wouldnt fill it full obviously, can you bolt them down securly enough?