Ah okay, than mayby my Umo+ is not so bad...
How big are your washers?
Are the big like the hole beering or just like the ax?
The head on my UMO+ is not "very easy" to move. There is a little bit of resistance, but I can move it with one finger. Moving in one direction is easy; moving diagonally takes more force, but I can still do it with one finger (my index finger).
I think the most important thing is that the resistance is constant along the travel.