Benchmade is similar to Ernie Ball Music Man. If you have a problem with a Music Man product such as a pickup in your bass, the preamp, or the neck, you have to send the part (or bass) into them to get it replaced. It's their way of protecting the proprietary designs. Fender on the other hand mass produces and makes available EVERY part because they want you to buy Fender parts. Nothing is wrong with either business model.
When I was playing Music Man I was pretty ticked that I had to send a bass in. I gotta tell you though, it was a great experience and my bass came back like it was new. A local tech screwed the nut up on the bass so EBMM said, send it to us we'll take care of you. Their product was so good that I only had to send 1 bass in out of probably 10. I got back a new bass, fresh strings on the bass with a couple of extra packs (50 dollar value) as well as some other case candy.