yeah that's probably plenty, i way overkilled mine when i repaired it, like fourbarrel, i'm looking for an sc10, so it won't be a concern for me anymore
The way mine was broken it was below your gussets so I really beefed mine up. here is a picture of the way I beefed mine up I am sure it is over kill but I only want to do it once.
i actually did mine with even more gusset than mntmaxman600s, like i said probably way overkill, mine broke right at the joint so your gussets would work for my break anyway