Advice? Action is too high up the neck

I posted about this ~1980 Ome banjo yesterday. I acquired it and was looking for info on year & model. Anyway, it feels and sounds absolutely amazing. For being untouched for years (and not being set up in who-knows-how-long) it plays great… lower on the neck. Up high, I’m finding it nearly unplayable. (granted I am accustomed to my Nechville Classic, set up before I bought it by Mike Munford). There is not a reputable banjo luthier within several hours drive of where I currently live. I’ve searched online & watched several videos, but I can’t find anything pertaining to coordinator rods situated the way these are, with bolts on the inside only. I’m not willing to mess the tailpiece unless I had confidence in what I was attempting to do (there are screws on the outside of the rim which tighten to the rods/bolts, but they are behind the tailpiece bracket).

I would love any possible advice on anything try (safely) to significantly lower the action up high on the neck, while only changing the lower neck action as slightly as possible.

Thanks to you all very much