Here is a comment I put in another thread here.
"I'm forever grateful that over thirty years ago I put my first Sinclair electronic calculator together. I've been constructing ever technologically advanced pieces of computer-type equipment ever since. Nowadays you don't even need to use a soldering iron, it all slots and screws together.
I know that not everyone is capable of doing this but, whoever thinks they may be able to, there are plenty of magazine articles and net sites that can give plenty of advice on building and recommendations/cures if anything should go awry.
Just think of being able to get rid of all the irritation, anger and frustration felt when you are dealing with these commercial concerns. OK, you may get some when you build your own but I can't imagine it being anything like the pain and suffering so frequently described by various contributors to these columns."
It seems pretty much that you could be lumbered whoever you deal with. Remember, though, that the vast majority of customers have no problems at all. It is only when things stray from the norm.