Mount T-nut on the inside of buffle.
Drilled through holls.
Set cap bolts temporarily.
Dig pits.
Check diamater of the pit.
Apply some bond.
Fix the unit with bolt and T-nut. No problem.
Finish stand with "pine yellow" colored varnish.
Bond right side part and buffle.
Cut pipe to use duct.
Bond (left + read) + (right + buffle).
Assemble is complete. Do finish.
Second time of splay varnish. left: before, right: after.
Third time of splay varnish. left: before, right: after.
Finish is complete.
Wireing, set duct and mount unit, everything is done!