Purchased the riser block for a "Polar" (white) version of the 555 bandsaw. It was easy to install, instructions were clear, and it took little time to set the saw up again (although I used a different blade, a Wood Slicer, than the one Grizzly sent). I now have the capability I needed for resawing bigger boards and should have done this long ago. Because this version is green, I spray painted it white. With the new blade it resaws every hardwood I have put on the saw (not going to try Ipe, though).