In this photo of Alex and his backline (said to be during the Hemispheres 1979 tour), you can see what is more than likely, two Roland RE-301s (heir and a spare) on top of his other equipment.

Used for xx, as mentioned by mixing engineer Rodiadh McDonald in this June 2011 Sound on Sound article.

"Jamie was there for most of the time but when we'd be recording, he'd stay overnight and work on the beats and things like that,” says Rodaidh. "While we might be doing vocals, he'd be in the meeting room with his laptop, Logic and his MPC, sometimes going through a Boss DD3, a Boss overdrive pedal and a Roland Space Echo RE301, which he used quite a lot. He also used a lot of Logic plug‑ins. We'd use a rough version of the beat for the track but, throughout the recordings and afterwards, he'd take that away and he'd work really hard on making it all sound good and making it work together.”

In this Youtube video at minute 34:10 The Alchemist it's seen making an interview in front of his desk with the rack behind him. Here you can see the Roland RE-301 Chorus Echo under the Avalon 737.

In the basement of Mick's house is a small eight-track demo studio/rehearsal room simply equipped with a Fostex A-8 tape machine, a Fostex 350 mixer, a Roland 301 echo unit and a few dynamic mikes.

You can the the Roland @ the 1:05 mark of the attached video.

In this Rig Rundown, Brian Setzer’s guitar tech, Tyler Sweet, discusses Setzer’s settings for the Roland RE-301. At 18:35, he says “Once in a while, he uses some chorus for couple of tunes. More reverb, less reverb type thing. For the most part it just stays the same. If he feels that he’s not getting enough something, he’ll go over and play with it.”

At 13:41 Copeland mentions buying a Roland Space Echo at the store "Manny's".

Richard Barbieri used a "Chorus Echo 301," according to this article.

In an interview featured in the Ultimate Guitar article "Forgotten Guitar Gear Uli Jon Roth Used During His Scorpions Era," Uli Jon Roth specifically mentions his use of the Roland RE-301 Chorus Echo.

David Sylvian used a "Chorus Echo 301," according to this article.

After he did use the Roland Space Echo RE-201 He did use the Roland Chorus-Echo RE-301on a Live Performance in Kofu, Japan Can been seen on Youtube toe @ SAKURAZA IN KOFU, YAMANASHI OCT 8, 2018 Time 2:21 on the left side on his Orange Head sits a Roland Chorus-Echo RE-301 on Top https://youtu.be/07Dk-RdsPoI?t=141

Mentioned on page 32 of the June 1999 issue of Guitar Player, erroneously listed as a "Roland CE-301 Chorus Echo".