Re: Issues with tuning - '00 Stage Custom
I'll bet that your ears are still used to how that other kit sounded. I think you just need to get on and play them for a while to get the feel for what they should sound like.
Changing out the 13 year-old reso heads is probably a good idea, too.
Think of it like this:
Those old broken-in sneakers feel great - even with the hole in the side by the little toe. Then one day you go out and buy some new sneakers. Yeah, sure, they feel good but they're not like your old pair. A few weeks pass by and you put the old sneakers back on and then you realize, "Wow, these feel weird!"
Give yourself time to get used to your current set-up and play around with the tunings. When you get there, you'll know it.
Gretsch Catalina Maple Drums / Ludwig Acrolite Snare / Sabian Cymbals