I have had mine for a couple of years, but brewed with no modifications. I have bagged any pellet hops that I use to this point. Can't find some of the new hops in whole form, so going to have to find a better solution.
Next brew, planning to take the false bottom out of the boil kettle, and just angle the dip tube to the side to allow for a hopstand and whirlpool. It's attached with a tri-clamp so should work - will just have to account for the wort left behind. Jaybird at Norcal also has replacement false bottoms that work fine with the Brew-Magic kettles/keggles, and has stands for the false bottom that can act as a trub/hops filter. I may go this route if the whirlpool doesn't work well. Might take some pictures... will have to see how the brew day goes.
I have also considered plumbing in the hops/trub filter from Brewers Hardware somehow, but the setup makes that different as you would want it behind the pump, not in front to get the pressure required.
I have recirculated using the long dip tube that comes from the MLT, sterilized in the boil, through a mesh bag to keep trub and hops out of the fermenter. Not the best way - but passable.
Not really a modification, but I have mounted a pump and built tri-clamp hoses to allow me to recirc independent of the hard plumbing if required. Handy if the mash sticks, but not necessary.