I needed to raise the front of my wheel stand pro up a bit so I could have my wheel at the correct height for my office chair. This raises the front feet by 60 mm if you don't use any rubber pads underneath and slightly more if you do. It is intended to be a TIGHT fit onto the rubber feet on the front tube, so you might need to work a bit to get them on. An Alternative is to scale the print in X/Y to make the hole slightly larger. I prefer the tight fit so things don't move around under extreme wheel loads.
Note that there is a front and back; The face that is more vertical is intended to be the front to allow the wheels on my office chair to get as close as needed without interference. It really doesn't matter which way you put them on but if you flip them around, the 30° angled face will end up sticking out a bit in front of the stand.
The author marked this model as their own original creation.