Understood, thanks for clarifying.
My use of the word "tight" was related to the bolt not being "loose" and therefore able to move around. When I did this job in 2019, I bought a number of different standard-sized bonded washers to try and get a "not-loose" position of the V-bolt which also lined up with the line-cutter. I was unable to achieve that goal. The use of mastic as a sealant/fixing compound is required to ensure the bolt remains "not-loose".
This was another one of those classic boat projects which should take a couple of hours to complete, but extends to days waiting for washers to arrive by mail!