My Paradigm 390 MP gets delivered to my RV lot in Blairsville Georgia on the 6th of January. It will be kept there long term. There is a concrete slab that the Paradigm will be parked on. I've seen some 5th wheels in the park with a tripod stabilizer on the pin. I am surmising these are used to provide some stability under cap where pin mates up with the tripod instead of the hitch in the bed of the truck. Are these a good idea? Can all jacks be retracted so that the weight of the unit will be carried by the tires and the tripod? Excuse the ignorance but I'm a cherry in the world of 5th wheels.