Outer Limits 4x4 Board

I am going to put some auxillary tanks on my RR to carry some more water, fuel and a compressed air. I wanted to get others ideas on where they have put theirs and what worked well and what has not.

At the moment the plan is to fit two sill tanks, one for fuel and one for water and put a compressed air tank under at the rear somewhere. I have a tank at the moment that is about 20L but it looks bit too big to fit anywhere at the rear.

Has anyone put a tank inside the left rear quarter panel? This is another spot that I thought a water tank could go.

The car is being set up for some camping duties. I want to loose as little clearance as possible.

Cheers

For the air tank the best trick I have seen which doesn't lose space is to convert the bolt in gearbox crossmember to an air tank. Just weld up the holes and add some air fittings.