Instead of using a fiddle block for four to one,use two Schaefer Utility blocks. Place them on each side of the rod, using two 1/4" bolts. The Schaefer utility block is 505-38 or 504-38. All the holes match up and all you need to do is replace the bolts. This is same block that S2 used.
Ok I got the fiddle blocks however it's not clear to me where the point of purchase is? Tie of to the block loop thru the slave sheave, down to the block, the where? it seems an additional sheave at the to is missing?
I took my fiddle block off, measured the sheaves, called scheafer marine and they sent me 2 new sheaves. What a difference it made in raising the keel!