The connection will depend on the age of your catalac
and the type of mast/boom that you have.
The original were round booms and had roller reefing gear
. If I remember correctly these were kemp and the roller handle was at the forward end of the boom. The masts on these boats suffered from some corrosion
at the spreader join. IIRC the spreaders were round. Most of these also had twin forestays, and hanked on sails
. The change to Proctor masts and slab reefing was I believe before the 9m Mk2 was launched. The 9m Mk1 had round windows for the aft cabin
and heads compartment, whilst the Mk2 had windows for those compartments that matched the rest of the boat.
The proctor mast
was much better, and had a flat blade spreader, and as far as i know, nobody has had any problems with the spreader connection. The boom was rather more rectangular in section and the connection to the mast was a single
bolt through system. The fitting had stag horns for the slab reefing.
I have looked through my pictures and do not have an actual picture of the fitting, but if you ask the specific question, I should be able to either draw or describe the answer.