I've been diligently double checking everything by starting from page 1 in the build manual, methodically checking every bolt and cable etc. I found a loose bolt 😲. Dismaying there was one, but good to know the methodical check picked it up. I'm just over half way through the manual now. I bought a cheap borescope to get to the hard to see places. Definitely worth buying even if it just gets used once a year.