Re: Message In A Bottle...chorus? delay?
Thanks for the vote of confidence, WhoFan, but I was traveling all day yesterday and missed this thread until now.
Summers indeed used an Electric Mistress - though everybody thought of him as a "chorus guy", it was really a flanger. Toward the end of The Police's original run, he added chorus. You can see a blue Boss box (probably a CE-2) in the videos from the Synchronicity tour, but it's added on outside his pedalboard. "Message in a Bottle" is the definitely the Mistress, though.
I've always used my Boss BF-2 to get the Summers sound. I turn the "manual" control all the way down, which centers it around the lowest frequencies. What this really does is set the base delay time as long as it goes, approaching the longer delay times used by a chorus. I set the speed and depth at moderate levels, and the regen fairly low. I'd have to go look at my board to get the exact settings.
The shimmery chords in the chorus also had a Dyna Comp compressor and a delay - he used a tube (I think) Echoplex and had an unnamed analog delay on his pedalboard.
Amps were Cornish-modified JMP 4-input, non-master volume, 100-watt Marshalls with 6550 output tubes. I suspect he used them in the studio, too. I got the impression from his book that he just kinda set up his stage rig in the studio and played. For "Message" it might have been a Fender Twin - he used one of those on the early tours before they got big.