Number 1 and 6 I got with timing marker. It's the others I am seeking the best solution.

What is working now is to wrap a Phillips screwdriver with tape,,,,shove it in spark plug hole, turn engine by hand until will not go anymore, know I got that cylinder ok, then assume that its "companion" cylinder is good to go.

Not using any air as cannot get chuck on 2,4,6 so just let valve rest on piston. Then place a tight 'O' ring on valve after pulling it off piston to put keepers back on. Then 'fish' 'O' ring out with a dental pick. A little tedious but can get it. Does anyone know of any downside of leaving the 'O' ring on stem,,,,outside of possibility squosing it between retainer and retainer.