Josh,
My club did this a couple of years ago.
We invited John Glezellis to come to our field and work with pilots.
He agreed, we covered all his expenses and gave him a little something as a thank you.
I announced it and got several people from my club and a couple from other clubs to attend.
I can't remember the IMAC list I put it on, but since it wasn't an IMAC event, I could not record it as an event.
I think the cost was $25 for two days.
He adjusted everyones planes first to his liking then you could go from there.
I had a problem with mine and I think it was the CG but the plane flew great after he finished.
I didn't understand why we didn't get more response but it wasn't for trying.