I am planning on my character being a troll mage who's corp born. In talks with my GM we have determined that in his world corp people get forced implants. So I am getting a free skilljack for better or for worse (as it screws with my magic).
But this leaves me with .7 essence to play with and gives me some possibilities in the future as I am completely broke at the moment. However, my characters drive is to remove my corp SIN and live a free life. Part of that might be to remove the device which they "gave" me.
In doing this would there be any essence recovery? I don't see anything in the rules. Also how do essence costs work with upgrading? Say I went from a standard rank 3 skilljack to a rank 6 would it cost a full .3 essence for me, giving me 5.4 essence? Or would it be unaffected? And how then would things work if it was an alpha ware or delta ware upgrade, since they have lower essence costs? This is going to probably not affect me with this character but I want to play a street Sam who I'm sure will need some chrome.