Hi Ted, All,

Most common fault?  --gear legs/gear doors interference.
Solution--stiffened doors/increased clearance by ramping doors open further.
Over tightening flight control hinge bolts resulting in tight flight
controls.

Oddball faults?  --I was the guy who found the IV constructed without
removing the peelply/ and the radio rack installed with light aluminum
siding (house) channels with drywall screws through the firewall.
And another one with metal straps (1/8 X 2 inch) bent to modify and install
a IO 540 in the TSI0 550 engine mount.

Mistakes?  -- not checking EVERYTHING and taking anything for granted during
the inspection.

Scared you the most? The IV-P spin that required 6000 plus feet to recover.

Recommendations;
Good pictures, log book entries, glue coupons.
Add a gear up indicating system.
Good static bonding/wicks. Use a 100W landing light. One leg by jumper wire
to positive on battery-- Ground to static wick mount.
         Strong light= good ground return. An Ohmmeter check is not a good
check.
Fuel quality/quantity/flow check. CLEAN--and ---In gals equals out gals--
and elect fuel pump give good flow.
AND-never put anything into a tank that the engine cannot run with.  In
other words, never use water to checking fuel tank for leaks.
Calibrate/check all engine instruments.
Stick with the manual.
Finish a project- once started.

And on and on---
PS. Don't forget Vents and drains!

Charlie Kohler