On Nov 18, 9:04*am, wrote:
...
4. Able to do actions required to ensure that control surfaces meet
mass and moment specifications in aircraft
maintenace manual. This almost always requires removal and
reinstallation after weighing. *Nobody who has done this very often
leaves surfaces on. This requires logbook entry by qualified
individual- A&P.

Hank, remember that we are talking about an experimental aircraft,
which 14CFR43.1(b) exempts from everything in part 43. So unless the
OpLims require an A&P signoff, I would [citation needed] any generic
statement about an A&P signoff being required.

5. Able to accomplish appropriate weight and balance record keeping
and revision to operation limits. Logbook entry by A&P.

Same as above.

Many gliders are started on this path by"non pros". The list is long
of those that get completed later by "pros" at greater
expense than hoped.

Many gliders and airplanes have also been built, maintained, and
repaired by "non pros," at lower expense, with greater performance and
utility, and greater enjoyment than hoped.

Bottom line, I agree with the sentiment that you should seek guidance
wisely, and proceed cautiously, when undertaking critical repair and
maintenance operations. But I would disagree with the idea, implied or
explicit, that working on aircraft is too difficult to be left to any
ordinary folks.

Thanks again, Bob K.
www.hpaircraft.com