I’m adding these Blocks now so I don’t have to deal with going inside the rigging in order to do it later.
I used a Clove Hitch for those Tri-Blocks that go on either side of the Foremast.
I use mostly the Figure 8 Noose for the Blocks and I glue the loose end of the line to the working end.
Also a Taut-Line Hitch… If I’m able. Otherwise I end up doing a simple Square Knot in order to get it tight and do another loop over it.