CDL has this video online, might help out a bit, where did you buy the evaporator Lanark? They should be able to help you out too. I've been in there before and seen evaporators ready to be shipped out already bricked and I'm sure they wouldn't send it out with issues like your having. Give them a call. If not call the one in monkland and talk to Rob. You can text him pictures too.

https://youtu.be/sxN0xxQBslg