The message
from David Holgate contains these words:

Hi Peter

of carts, MM and MC. And of course, unlike the RB300, you can adjust
cartridge position and VTA properly. Put it on your LP12, and sell the
RB300 for a nice new cart!

David

Correcting myself--of course you can adjust the cart position on the
RB250 (I was thinking of the Scorpio). I still prefer my Aurum though.

David