why dont you ring up mojo? they'll be more helpful than people on here as they know everything about it.

You can't get the BOS internals any more for other manufacturers forks.

It sounds like they changed the shim stack in the damping cartridge for you. Which 'is' something you can do yourself, and the instructions are on the Fox website. Be warned though, as its easy to trash the cartridge & Mojo will relieve you nearly £300 for a new one.

There is more you can do than changing the shim stack, but you really need to understand the intricacies of suspension tuning & its impacts to what effect it will have on the actual feel of the forks.

If you're brave, have a play, even things such as changing the oil weight in the cartridge can have an effect on the feel of the fork. Be prepared though, for if you make an expensive mistake!