Thanks for the info. I looked in my box and I have two Royal Engines .40. Can't remember how I got two. I soaked them in oil but that was long ago. They felt pretty tight. I had a K&S but it would conk out mid flight. Maybe I'll take them to the club and see if someone wants to see if they work since I no longer have a test bench.
I will take flying lessons hopefully end of the month or early next. I thought I read online that the hobby lost popularity over the decades Hopefully, it's making a comeback.