Re: swing keel problem
Yes I see the reccess your refering to,but how did you install the bracket and roller you fabricated. did you simply reave the new cable, run it through the block from below then wigle the assembly into the recess, then attach to the CB.
If so I'd be concerned the assembly would drop down when you lower the CB.
Sorry for all the questions, the idea is a good one, just can't see in my mind how it's installed.