Machine shop woes.....

I cant imagine a shop would warranty any engine that was raced unless they did the whole process from start to finish including dyno.....and even then Im not sure they would .
Thats not what Im looking for or expecting.
The shop that did the bad valve job wouldnt stand behind their work.... I had 3 seperate unsoliceted comments on them including a few from FABO member viewing pics in an unrelated post and 2 from other machine shops ... 1 of which just happened to see the head laying there...
Maybe its just the way they communicate things to you....but I often feel as though Im getting scammed.