We have an L4H3 Ducato self build which weighs in at around 3500kg when carrying our toys. Correct tyre pressures are 65psi front and 72psi rear. Obviously this means that the ground pressure is very high with a very small footprint. On soft ground it is easy for the wheels to dig in and get stuck. I was thinking of getting a Ring RAC 900 air compressor such that on soft ground I can drop the tyre pressures down to say about 20psi until on firm ground and then quickly reinflate with the compressor. Has anyone else tried this, and if so, any comments? Cheers David.