Equal weight works well in strong times. Expect the largest caps to outperform otherwise. I hit a home-run for my kids years ago by putting some of their funds in QQQ, the NASDAQ 100 index fund.
It would be quite a math task to compute annual rate of return on my LEG. As I recall it was originally acquired as a high yielding bond which had the kicker of being convertible into the then-very obscure shares of Leggett & Platt. When rates dropped, LEG called in the bonds (they were callable) and we converted into LEG common, which then skyrocketed. And that's not counting the great dividends which rose just as fast.
I wouldn't expect a smooth ride for LEG which is dependent on imports from Asia with all that entails.