Tapered pins are a big deal, and alignment is critical, but Rainier Arms sells the jig that makes that particular job easy. With that thing, you can do it at home - with a hand drill. <thumbsup>
I'll never pay someone to do something for me when I can buy the tools to complete that job, and spend the same amount or a little more. By doing it myself, even buying the tool, I've added a capability. Even if I only use it once.