For the owners of this ballhead out there, I was wondering if your vertical drop notch was at 90 degrees from horizontal. I did purchase a RRS L-plate so it won't really matter, but I was wondering why my drop notch didn't settle at 90 degrees, but more like 93-95 degrees. Wouldn't it be inconvenient for someone to use that drop notch for vertical photography if they didn't have an L-Plate? Perhaps there is a reason for it that I don't see so please enlighten me.