IMO, yes and no, In the area a gusset is suggested I don't see a stress concentration, relative to the rest of his design, and therefore adding a gusset would only make another area more prone to flexing and stress concentration issues, it looks to me well balanced in this concern, sure he could add stuff all over it, with the added weight. Bottom line much better execution. I would like to know however how beefy his mounting holes are 3" sides on the 2x3's.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
