"Love my perpetual calendar and it sits proudly on my desk at work (clean desk policy but, so far it's yet to be removed) I did make a couple of small modifications to the official build instructions though, which I've detailed in the accompanying pics. There are a number of of colour-coded tiles used on some of the cube faces and it took my a moment to work out their purpose, basically to provide a level cross-section for the cube to sit on when that face is down in the tray. With that in mind I found a couple of the the "1" faces could use an extra tile to complete the line of three, giving it more flexibility on the angle the cube can sit whilst remaining level. Also, I didn't like the shape of the "7" used. Top crossbar then a two stud tile down from the right side. I switch the two stud tile for a pair of singles, one white, one colour coded to give the diagonal a better shape (IMO). To achieve this for both "7" I did need to reconfigure the "8" on the red/orange cube as without this change, there weren't enough white single tiles."
Images for this Review
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Additional colour coded tiles added to allow the block to sit straight when opposite number displayed (note only required on two of the boxes)
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Changed the sevens to have more of a diagonal, switched the two stud tile to a single white and single colour coded tile (down from the top right of the cross bar) Note, to have enough pieces in the set to do this I had to alter the config of the "red 8"