That makes sense. I'm going to reread OD&D (when the OD&D booklets came out in PDF I printed them all and stapled them into booklets), then write an adventure and after we've got used to OD&D I'll add Arduin.
I picked up the first three volumes of the original Arduin Grimoire recently because of the over-the-top energy they exude. How do you approach playing it now? Take the fighter and magic user from OD&D and use the other classes from the Grimoires? Throw whatever classes and stuff that appeals...