Hey, Barry. I've got one of those guitars! I don't know about the pot sizes. You might have better success asking this in the Guitar Tech forum.

https://www.guitartricks.com/forum/threads.php?f=30

For what it's worth, I thought I might want to upgrade the pickups in mine. But the stock ones have worked well. And I've never had trouble with the pots or switch. Hope that helps!