Hi, thanks very much for the pointers, much appreciated.
I have a few evaporators here from a few people and some cap tube, but, the guy that owns the unit ideally wants to stick with the stock evap setup as its apparently very easy to mount and seal with seal string. I think he has a chilly evap somewhere and from what I get from our conversation it sounds a little bit of a pain in the a&$e to mount with the foam donught thing, prommy evap set up has some plastic holder thing which looks lots easier to me. Anyhow, going to reclaim the stock gas change drier and fill with 404a then stick it onto me load tester and see what we get. I have a feeling it's not going to pull amazing temps but we can only have a play and see..

Once again, thanks for the help.