"Not saying it's a Schon."
That's good, because it's not. Wght. bolt design and size is not an identifier of the builder.
3/8x16 is the most common size and it's used by 100s of builders, including myself.
Because I use it doesn't mean I'm chained to it. I also use 1/2x13 when needed.
You traded for a cue that you're apparently pleased with. Does it really matter who built it?
KJ