Been a long time between drinks, been working on this one for a few months since a 6 month long hiatus due to weather and life.
Don't know what NGC 3586 is? Well, it's NGC 3576 but a less common designation (it's a specific part).
33 hours of data captured with the venerable BeamTech 250 and QHY600, 10 hours each of Ha, OIII & SII and 3 hours of RGB. As happy as I am with the SHO data I do wonder whether I need to change the RGB stars as I have a feeling that their colour is a blue too blue, at least some of them anyway.
Link to high res