The elephant in the room is the removal of the weight of the bottle from the tongue. The need to keep weight balance cast to the front of a trailer; to prevent the unit from swaying is well documented. And the leverage of the weight at the back bumper, or tongue of a trailer are greatly amplified compared to even a few feet closer to the center fulcrum point. Don't be surprised if in removal of tongue weight, your trailer becomes more inclined to pendulum behind you.
I suspect that is why in this same month's publication, when a man replaced his two lead acid batteries with a single lighter lithium one, he moved his spare tire to the tongue.
2005 Winnebago Sightseer Class A
8.1 Workhorse - GM 4 speed