the 2 blocks on the copit-side are https://www.ronstan.com/marine/produ...prodno=RF30174
the stbd block on the crossbar of the WP with rope-angle~150* is quite highly loaded & had tobe replaced by a 50mm BB block. Better solution: lead ropes to wheel
from both sides (wasn't possible in our case)
brought with it comparatively high loads on the lines, as the wheel was so large & had only +1,33 turns lock-lock - would have done better with a considerably larger wheeldrum, but worked ok as it was. Crossbar on WP had to be tied down as due to the forces on the lines it tended to be moved forward no matter how hard we clamped.
Will dig for more pics later