This is just a light suggestion.
While back I made a pedal with an optical compressor and a sonic stomp together and modded them for bass. Both circuits give some added volume as well as clears up the sound and seperates it in the mix. The bass player I made it for loved it and said it gave him so much more volume and clarity he started using a smaller amp.
I think you could get by with just the sonic stomp but a compressor is always nice on bass, it evens things out well.
You can pick up a sonic maximizer board at madbean
http://www.madbeanpedals.com/projects/index.htmlIt's called the Bloviator II
http://www.madbeanpedals.com/projects/Bloviator/docs/BloviatorII.pdfI wrote up the mods here on this forum a while back, I can't find the info yet but ill post back when I find which value changes I made, If your interested still.
:::edit this thread would get more eyes on it if it where in the main building your own stompbox section pretty much everyone posts there now:::