If at some point you wish to have several other boxes, considering something like a MIO4 could be a good idea…
Anyway, to synchronize OP-1, you need such kind of USB hub.
This said, OP-1 has the bad behavior that it resends the clock when in sync mode, and this can’t be deactivated (unless the las OS takes care of this, I should check).
So you need to be able to deactivate midi sync from your usb midi hub.
MIO4 can take care of this, but a RasPi solution might be as good and cheaper 