I have done my fair share of air, hydraulic and electric leveling system maintenance and repairs. I would elect a simple manual touch pad hydraulic leveling system that has no springs on the jacks. I have this with my Big Foot system and have never had a problem of the four independent pumps and jacks ever working. The coach is now 11+ years old.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7