The first run reels of the SSm design, contained a crosswind block with an extra hole drilled in the upper center of the groove where the reel shaft sits, which screwed directly into the shaft itself. This design was unstable, putting too much pressure on the shaft. Newer versions of the reel will contain the original design from the older SS reels: the crosswind block with crosswind plate, secured with two screws.
Notes For Ordering
If you are replacing the older 43-950M crosswind block (with extra hole and single screw) with the 43N-950M block, you will also need to order the crosswind block plate and crosswind block screws below:
If you still have a good 43-950M block, there is no need to change it - just add the crosswind block plate and crosswind block screws below for added strength. Leave in the center screw - without it, the shaft is weaker. Eventually, Penn will probably issue shafts with no holes in them, but currently, those are unavailable.