I agree, he needs to get rid of the lower swivel.

He needs to do more than that though. The end of the forestay that fit on the lower swivel now will not fit into the block.

The stock H-18 forestay has what I call a dead eye at one end and a forked eye at the other. The dead eye attaches to the block and the forked eye attaches to the adjuster plate that fits into the furler.

I have this system on my boat.