That's great.
Checking a dozen times the first 25,000? That may be a record.
I keep a log per valve that shows me what it was and if I had to adjust, what I set it to, so I can estimate how frequently I need to do the valves. I think I'm comfy with 10,000 miles of normal riding. If I was going to do a lot of high rpm stuff, I'd check sooner.