Thanks, Darwin. I saw your post elsewhere about the "sitar sound" and wondered if it might be the same thing I'm experiencing.
Actually, the angle of my saddles is all over the place.

I had been setting the saddle of the high-E at an extreme angle to try to get it aligned with pole-piece on the neck pickup, and setting the others to compensate. This always bothered me because it looks terrible -- nothing like the pictures you see of other guitars, and nothing like I remember it looking when I took it out of its case for the first time 20 years ago. So last night, I raised the bridge, flattened all the saddles, and then adjusted to taste.

Now flanging sitar is gone for the most part! I think it's staying in tune better, too.

Also, it occurred to me while setting up that the first step with the using the spacer block to level the bridge is not really "set-up" -- it's
calibration. That may just seem like semantics, but it might be why so many of us (like me) get our G&L set up wrong. For years I thought it was ok to skip this step. Probably this was because it's not easy to find a 3/16 inch spacer block especially in a country that uses the metric system.

Only AFTER the height and angle of the bridge plate are 'calibrated' can you proceed to setting-up the guitar.
Last night, inspired by the "toothbrush trick," I improvised the spacer block with the lid of a little sample cigarette case I got at a club event years ago (

I knew it would come in handy someday) stacked on an old train pass. Together, they measured just under the 5mm mark on the callipers -- close enough. However, the set-up saga continues because now it's going out of tune when I pull UP. Teflon-tape time?