I've tried to search and find an answer, but with no luck. Who has replaced their SE/S2 trem block with a MannMade brass block? How big is the diff in sustain? Also, did everything line up correctly? I'm also considering the one-piece bridge. If anyone has installed this themselves, is it as easy as the MannMade video makes it look? Does everything line up correctly and new screws go in easily? Thanks in advance.
Personally, I would leave the stock tremolo unit right on there, including the block. These should be quality items. A brass block may look like a good thing, but from what I have read, it can change the sound of your guitar. When PRS designs these guitars they build a tremolo unit that contributes to the sound of the guitar.
If you want to change these things, there is no problem with that. It's your guitar. The results can be unpredictable.
I don't think I would install a one piece tremolo. I like the way of being able to take it apart and I think when it is screwed together tightly, as it should be, that there is very excellent contact and the vibrations can move between the two parts with no problem. I don't think it is a contact surface that greatly changes the sound as the vibrations move from one piece to the other.
You have to do what you want to do, but sometimes it is best to leave a nice guitar alone when it comes to major assemblies. Changing tuners may be a good idea, especially if you get locking ones. Changing other items might also yield decent results. Many of these nice instruments have had a lot of precision work done to fit the various parts and assemblies so that they feel and play like great instruments.
When it comes to sustain I think that it can be improved by purchasing an amplifier that is known to yield great sustain. I don't know if they amplify the inherent sustain of the guitar or if they themselves impart greater more beautiful sustain. More likely it is a combination of the two.
A new speaker, preferably an upgrade, can change the sound of an amplifier and in some cases improve the sound and make it more satisfying to the user. Guitar pickup upgrades can sometimes offer greater sustain and improve the sound of the guitar to individual users. I'm not sure if replacing small parts attain these major changes in a guitar rig's sound.
Try some things out. A brass block might be great for you, as well as a one piece tremolo unit - that might be something you will like.
Saving up and buying guitars and amps that sound as close to what you are looking for, stock, might also be a good idea.
Good luck with your mods.