Glad my findings are helping others
Thats what makes this site such a powerful tool!! It would take several years on my own to figure out half of what I've learned here.
I've found my furnace to be much happier with the grates the right way. No jams and more ash clearing is attainable
.... Who says you can't burn coal effectively in these units hahaha... I've got mine running like a finely tuned instrument!!