On the LV combination you can do the same thing for the 1/4”, the skates go together and the blade protrudes a smidgeon each side. The blade retaining screw ‘just’ reaches the blade edge but it’s too low down to stop skewing of the blade during use. The blade skews and gouges a slope to one side of the groove you are making. Hence the resistance and consequent failure to cut. All looks good but it is not. Removing the second skate is essential.
You can do a lot with very little! You can do a little more with a lot!