Here you can see quite the size difference between the original portajohn1 and the low profile portajohn2.
Modular Input Device on Wood
Comparing the thickness of the low profile portajohn2 to the portajohn1
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Comparing the thickness of the low profile portajohn2 to the portajohn1
Here you can see quite the size difference between the original portajohn1 and the low profile portajohn2.