I'm beginning to think you need to get hired PT at that store and find out what their recipe is. Then quit. LOL! Unless the discounts are too good.

Is it good enough to satisfy your craving?
Why don't you just buy the store's eliquid? IMO trying to find flavors to match something I love is really, really hard. I do much better finding new flavors that I like and I think it's because I'm much pickier about something I'm familar with (like coffee). I think it's possible, my hunch is that whoever put together some of the famous custard / tobacco vapes had a severe love and obession with the flavor to get them right. I just think it's a lot harder to meet an imagined expectation.
That does look like a good reciepe. The mix of creams are interesting. I also liked Lox's suggestion of adding magostream... (however that's spelled).