that'd be great if you could post the measurement along with a picture.. i searched up os150 and there are a lot of different ones...

Vixtor I'd buy a new fork but dang it.. the white on my frame is kind of a metallic white so its hard to match.. and sadly I care about aesthetics...
I'm pretty the 5mm shorter stem will put me under that 5mm limit...

And I'll try bicycle mechanics as well.