Just told Jaine what you were planning to do, if you remember she's a Nurse Practitioner, and she advised against doing the gig, especially singing! You've got a lot of healing and strengthening to do! Have you got a cardiac rehab program planned yet?
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Graham, Korg Pa1000, Korg G1 Air, Countryman E6, Roland BA330, 2 x Roland CM-30, , Mackie SRM150