The Solas website says it is compatible with Mercs 'Flow Torque' . I know the TP Hustler and Flow Torque are compatible, so I would guess it should work. Have you tried putting the TP hub into the Solas hub?
Looked at the TP sit and says they fit the Solas props. Prop is here at home and boat is at Alberta Beach so will try it this weekend. Have to bring the boat in Saturday and then we head to the Shuswaps for 2 weeks Sunday.