I have a similar set up though mine only uses 2 studs. I mounted it where the studs were and that forced my hand a little as they weren’t exactly where I was hoping thy would be but only by a couple inches.
The one thing my audio dealer recommended, and therefore I designed around, was mounting my turntable to a foundational wall to minimize vibration. This has worked out extremely well for me. Realize this may not be an option for you but if it is it’s highly recommended. YMMV.
The one thing my audio dealer recommended, and therefore I designed around, was mounting my turntable to a foundational wall to minimize vibration. This has worked out extremely well for me. Realize this may not be an option for you but if it is it’s highly recommended. YMMV.