Not getting the full story

I am in the process of getting a 2" lift on the explorer, which is a dramain it's self i can tell you, not being able to buy thing's for it unless you buy direct from Ford or the USA, anyway, found a 4wd place that would help me, finally !!, and inexpensive as well, around $300 to $400 wind up torsion bar for 2" lift at the front and 4" shackles for 2" lift at rear, beauty," so i thought", so arrange to book car in to get done, i told the guy at the 4b place i would ring him later that afternoon for a day that we could put it in so that other half was not without a vehicle. When i rang back i spoke a differant person, the guy that runs the place, apparently i had been speaking to a mechanic who only worked on the cars, he failed to tell me that i needed a engineer's certificate to go with the shackles, an extra $480 dollars, hence the title of the post. So I wonder how many people have been caught out with this after they have had work done, i was lucky, i found out before the work was done saving a lot of agro and money, i wont mention the 4b place for legal reasons of cause and as i am going for the other option bigger springs with them, worked a deal and wont be much dearer than the previous option.

Baz.