Our trailer weights 10,050 lbs dry,adding around 1000 lbs with propane,dishes,clothing,vacumn cleaner,mops etc,etc.Should I set on the 8.4AN ITBM setting on "light electric",and see how this works with the gain assist setting or should I go with the 10,000lbs "heavy electric"setting right out of the gate.Is it a question of to much gain with light and then go to heavy or is just based on a engineering software that RAM has set up based on their testing on the ITBM,Exhaust brake,tow haul mode all working together in these 2 different setting's.