Ok so I'm not very educated on icm implications but I can look at this just from an equity perspective.

I think his 3bet range in the cutoff looks something like this

I'm not sure if it should be wider or narrow to me because of stack sizes. I expect the small blind to have a wider range because he's getting such a small price to call. The cutoff makes the raise and if this was heads up i could probably find a fold but because I am getting such a small price to call and my hand has the chance to hit nutted boards i make the call. The flop comes and i expect the cutoff to bet on me with most of this range because of my small stack and icm implications so i shove. I expect the calling shove range to be something like this. With the suited hands only containing ss and the ako having a spade.

Not sure how to factor in the small blind because he is pretty likely to fold most of his range due to icm when i shove but vs this cuttoff calling range i have 40% equity. My shove if it gets called will be a pot of 321 834 with a price of 77481 meaning I will need 24% equity to profitably get my shove called. If I narrow his range to this: I still have 27% equity in this situation. The 10s have at least 1 spade in them.

So I think this was a profitable play and would like the input of everyone else. Haven't been playing for more than a month so if I have some pretty fundamental errors I would be grateful to have them explained.