Mike Stone on Good old fashioned lover boy

I love his voice. I would've loved to hear more of it, did he ever do any other singing on recordings (obviously I mean outside of Queen and that song).

"Good Old Fashioned Lover Boy" was written by Freddie and featured Mike Stone (sound engineer and co-producer) taking over the lead vocals for one line. ("Hey, boy, where'd you get it from? Hey, boy, where did you go?") Multi-tracked vocals enhanced the song as well as Brian's guitar choirs.

http://en.wikipedia.org/wiki/A_Day_at_the_Races_%28album%29

Well, seeing as he was a sound engineer, I dont think he would be recording much material...