We lead everything back on the Vee Jays. yes it is a lot of blocks and we lash them to the bottom of the mast.
but during full crew sailing the spin halyards [we have two], and pole topping lift are used at the mast.
random thoughts:
Before you start major work like this try lashing spare blocks where you think you are going to need them, and then try it out ... it rarely works like you would think, and a waste of effort if you are going to drill into the mast and find out the position doesn't work.
1. I suggest you just change out the sheaves on the existing turning blocks.
... that gives you 2 jib halyards on port, main, reef1 and spin halyard on starboard. standard sheaves and pins can be used, but a bit of a problem to get the old pins out.
Then you have to start thinking about 2 high deck organizers...
or fiddle blocks attached to a slide on the blade track which is what we do. and then we use harken 150 cam cleats.
Fiddle blocks at the bottom of the mast work better than double blocks or my recent mistake of trying a tripple block ... a tripple is just all bad.
2. the biggest mistake they ever made on J24s was to mount turning blocks to the deck.
3. also cunningham ... and main outhaul should be on list.
4. we have seen the vang switched so that it locks up at the boom instead of at the foot of the mast.
5. what you need to figure out is just how many lines go on each side and which is logical for your crew.
It is really nice off shore to not have to send someone forward to do simple adjustments.
Hello Cap'n Vic !
Where do you put all these turning blocks ?... I know... on the mast... but where on the mast ?
The old halyard turning blocks take all the space on the mast.
If we put other blocks above, it will be too high. Below, there is not enough space, owing to mast boot.
It's like a puzzle, I don't find solution !