I currently have only a 275 x 200 bed installed but I intend to change it to 300x300 when I find one I like. I also included pictures of the trucks I used to eliminate all the wheel spacers and convert the carriages to 3 wheels.
Update 12/12/2017: I made some changes since the original posting. I will add the links as soon as I can sort it all out. Also, a video of the printer in action.