In General OL are a Company that are using Rega Geometry, as OL piggy back rode on Rega’s success as a marketable product.
The learning of any constraints on the Tonearms interface to a TT, is always worthwhile.
Learning of any constraints known of, about how a OL Arm Mounts on a Rega TT, is a worthwhile investigation, prior to selecting it as a alternative Tonearm.
A friend who has a long-term history with OL Arms, had a purpose produced spacer in use, for one TT's in use with a OL Arm.
Hopefully the requested info is supplied.