Put clean rags into the columns above the runners as before.
Drill and fit fixings as before.
If the screws are used without nuts, the rear frame should be drilled tapping size - Ø6.8 and
the holes tapped M8 x 1.25 pitch.
Ensure that the rear frame thickness and material type are adequate.
Ensure threads are clean before using Loctite.
Ensure thread does not bottom out before the screw head is fully home.
Remove rags and swarf upon completion.
NOTE: Where the columns are bolted to timber pillars, fit washer plates under self l
locking nuts. Fit long washer plates where pillars are of aluminium to prevent
being localised in bolt positions.