Darn good advice! And don't forget to apply it to work done by others on your behalf.
For example, I recently had an A10 cylinder head refurbished by a reputable fettler - new valves, guides, springs, the whole magilla. I've always done this work myself, but this time I didn't for some reasons which are irrelevant to this post.
Anyway, the whole package was immaculate, and I installed up to the point of firing it up. What! No compression?
Upon disassembling, I found small cuttings between the inlet valve faces and their seats (and atop each piston). I would not have imagined anyone who'd done this fine a job would have overlooked this, and it certainly was not obvious. But I was so impressed with the appearance of the work that I failed to do my usual test which is to fill the combustion chambers with alcohol and check for leakage out of the ports, before installing the springs.
So I blew a couple of days of assembly labor as well as spoiling a new head gasket simply because I failed to give someone else's work a "turn". And I know better. . .
Thanks for reminding us, Des.
David