Almost every movable connection on my tractor is retained with either a Lynch pin, a hairpin or a bowtie cotter. The one exception is the connection between the 3ph arms and the iMatch frame. Those are old style split cotters. When my hydraulic top link arrives, I'll obviously be removing at least the top pin. Not a big fan of the sharp edges on split cotters, but not sure there's a low profile alternative for retaining pins that don't need to be removed on a regular basis.
Any thoughts or suggestions beyond just replacing them with the same?