Can't believe I didn't write down the heights before the install... thought I had it somewhere.
I did find this in my notes though...
GEN 1 has a 3.5" longest base.....
Gen 2 has a 5.5" longest base...
GEN 1 are 3.50 long on the long bracket with the tall Standoff.
GEN 2 are 5.50 long on the long bracket with tall standoff.
From Memory;
Gen1 - I think the backs were approx .750" high and the fronts approx 1.50" high.
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NOTE:
I added about a 5/8" spacer or so to the fronts to give the seat a more comfortable tilt. I suggest you experiment with different tilts / spacers under the fronts before making anything permanent. Your legs will thank you.
Mike