Cracked Valve Guide Pillars - OK to Use?

Yes that is a good way of looking at it. And I know you said the work was inexpensive but, if you paid someone for the work and then took it some where else and said take these apart and tell me what you think and they said looks like a cheap job done in a hurry is that what you want on your car. My point is when people do work in any industry where there are the experts I think they should do work that everyone would say that's a nice job. If you didn't have someone to explain it you have had to worry about it or replace the heads at great expense maybe to you. Not to get on my soap box to much on your post but work in the automotive industry has to be better than anywhere else because of the reputation of the industry and anyone doing poor work maybe shouldn't be in my industry anymore.