no problems the ekstra holes and bolts is all in the cover..as i renember.
..just fill some ekstra o rings in the end cover..so the shafts are bloked for rotation..then no harm vill ever happend...as good as the orginal parts..only thing..longer shafts..instead as the 4 short..is a improvent..but is it vorth the effortthe ovner vill never vear aut the shafts..use good oil and thange it 1 at year...