I did replace those Gretschbuckers though, because I didn't find them very Gretschy, which was the reason I wanted a Gretsch. It's so easy to manage, it's not worth being a factor. My suggest, get the one that feels/sounds best to you. Some guys just play with 11s, which hold it down tight. I pinned mine so's not worry about it either way, although I do wish I would have known about the glue stick. It's not permanent, but keep it still just enough. Some use a solvent free water soluble gluestick. many guys put a piece of double sided tap under it to keep it still. I use 10s, which is considered light for a hollowbody. it can move on you while you're playing if you use a light string guage. It's just like putting on your socks in the morning. I was getting to where I could just eyeball the thing and end up just about dead on. it doesn't matter anyways because if the intonation is set within the saddles, all you have to worry about is moving the bridge until the outer E's are right.

you can tape it in place whenever you need to take off all strings

The bridge will fall off when you change strings. Floating bridges are a hollowbody staple.

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