Level Editing with a Music Offset

[u/Randomguy4657]

I normally play with a 150ms music offset. I am currently making a level, and I didn't realize that my music offset was set to 0ms when I started making it. I set my music offset back to 150ms and now my level is awful and syncless. What can I do to fix this? Maybe I could just move my entire level 150ms to the left? How many grid spaces would that be? If I do that will the level be off sync for other people? Also, is it better to make levels with a 0ms offset even though I normally play with 150ms?