in our first test run of the rules after they came out in print, I let my guys who took professions with runecasting take 1d2+1 magnitudes worth of spells for free, just for the heck of it, and it worked ok.
With my spellweaving rules, I'm having spellweavers get 1d3+1 magnitudes of spells for the first school they learn, and then if they learn an additional school, they get 1 spell, typically of magnitude 1. That is more akin to Sorcery than runecasting though.
I plan to have a couple of the cultures in Leshan actually have professions that revolve around being attuned to a rune, and Those I'll probably let have one spell, chosen arbitrarily by me, and for any who pick up a rune during adventuring, they will have to pay for any spells.
I think I started to ramble, if that didn't make sense, throw a rock at me and I'll try to clarify my mutterings :lol: