Steps for Z-Spar masts
I have seen four different mast bases on the "bendy" Z-Spar mast. This is the mast with the taper at the top above he forestay attachment point.The base being discussed in this thread is the casting with two built-in sheaves for the halyards. This is the step and base I have. The halyards exit at the bottom of the mast, so you pull UP on them to raise sail. There are two ears on the rear of the base for the mast raising hinge pin. These are the ears that cracked (or broke completely off in my case) They are used just for raising the mast. There is NO locking pin in front. However, the underside of the base has two slots that match two tabs on the mast step on top of the cabin. The hinge pin goes through the rear tab on the nast step. Once the mast is near vertical, the tabs engage the slots and the mast base can't move. As several people (myself included) have found, this base is either no longer available or extremely expensive.The second base has a beefier hinge pin at the rear. This is the base that appears on the US Spars website for the H23. The step for this base has horizontal flanges on either side. The flanges have holes for mounting turning blocks so halyards can be run back to the cockpit. The halyards exit this mast above the winch, so you pull down to raise sail. I was quoted a price of $110 for this base and step. If you look carefully at the diagram, you will see two vertical tabs in the step as well. See attached link below. The third base has a hinge pin at the rear AND a locking pin at the front. I think this is the stock base on the H23.5. Otherwise, this step and base match the second type described above. Price is about the same also.The fourth base was a simple plug in the bottom of the mast. A 3/8" hole was drilled through the mast from one side to the other for the hinge pin, which also fit through the vertical sides of the deep aluminum channel step. The step was custom made by a local machine shop. Again, the halyards exit the mast above the winch.To set your mind at ease about the mast moving, lower it and examine the step and base. As long as you have the vertical tabs on the step and matching slots on the underside of the mast base, you should be OK. I haven't had any problems in over two years. PeterH23 "Raven"