So I needed to swap the cheap bridge on a SG Junior copy i bought. The Gotoh bridge fitted exactly in the existing holes in the body. But! The Gotoh is a very big bridge, and because of that, the bulk of the bridge is positioned much more towards the headstock than the old bridge. This has a huge impact on the intonation. With the little intonation screws, you can move the bridge backwards. And of course, you can adjust the saddles. But setting the bridge all the way back and setting the saddles to max is not enough to get the intonation right. So I'll have to re-drill the bridge-holes further back in the body of my guitar. Luckily for me, it's a project guitar to practice on, so that's fine, but if it would have been an expensive guitar I would've sent the Gotoh back.