Common sense should prevail on the tank issue. There will be too much weight and stress on those two ends, it's just silicone and plastic. The purpose of a stand is to distribute the weight, therefore the stress evenly, without a weak spot, it will maintain the weight. This is why we also level our tanks, keeping the weight even.
Please report back. I am now curious as to where it will blow first. I think the seals will pop on the sides. My son thinks it will split in half like the Titanic.
Every newbie, even the long term reefers, have questions. We are all here to share our opinions and knowledge. One way to rub a group wrong is to ask a question, get an genuine answer, then decide to do your own thing anyhow. Know it alls who know nothing really make you not even want to respond.
Freshwater and saltwater are complete opposites, absolutely no comparison.