congrats! Its a fine machine! I should know! Anyway- as for add-ons and mods, I would say that are tons of stuff done, and many are documented here on TBN. I suggest that you try doing a search here on key words like BX or whatever pops up in in your mind. I'd say that if you give it time, I would say within a year, you will come up with a question on how to mod/add something to fit YOUR needs on your tractor.
My favorite mod is the pvc pipe toolbox to mount on the FEL and chain holder. As soon I posted mine how I did it, others liked my idea and took it a step further to mod it to fit thier needs like painting it, adding handles, etc.
Take a look at harry's bxpanded website, its a good start on awesome addons for your BX.