I found that factory spec was close to spot on, any lower and string bending became annoying as the neighbouring string/s would go over my fingers instead of been snugly pressed against them.
Having said that, it really is all down to preference.
What the factory settings are, I can't remember, their in the manual.
Factory Specs
E .030" (2/64")
A .030" (2/64")
D .022" (1 1/128")
G .022" (1 1/128")
B .015" (1/64")
E .015" (1/64")
Dan's Specs
E .015"
A .014"
D .013"
G .012"
B .010"
E .009"
Is that action at the first fret Duane?
Factory Specs
E .030" (2/64")
A .030" (2/64")
D .022" (1 1/128")
G .022" (1 1/128")
B .015" (1/64")
E .015" (1/64")
Dan's Specs
E .015"
A .014"
D .013"
G .012"
B .010"
E .009"
Paul Balmer wrote a book about how to set up and maintain a Les Paul. It's got lots of good information and it's all stuff that just about anyone can do. I start by setting the action to factory specified height, and then I slowly begin lowering the action until I begin to hear fret buzz. When I start to hear fret buzz I raise the action slowly until the buzz stops and that's where I leave it. So, pretty much all of my guitars have a slightly different action height, but I've never measured any of them to see how low they were able to get.
About as low as I've ever been able to go on any electric has been:
High H - 4/64ths (2.0mm)
Low E - 5/64ths (2.4mm)
If I go down to 3/64ths and 4/64ths from there, I start hearing the strings slap against the frets and so the notes aren't as clear at that point. However this does work well with a light touch for Jazz type stuff.
And if I drop the high E down to 3/64 while keeping the low E at 5/64, the amount of fret rattle is more apparent on the high E side than the low E. So looks like 4/64 and 5/64 is the best I can get for how hard I play.
Remember when you lower the action you need to retune, and readjust the relief or it will definitely buzz due to the reduction in tension.
I tried duanes height last night for giggles, all I can say is that dude must have an extremely light touch to be playing at that height.
I ended up leaving mine at 1/16 (1.58mm) to try and force myself to develop a lighter touch. Not sure if the new faber bridge has anything to do with it not rattling, but it sounds and feels good. I've been at 1.8 for awhile and haven't really tried going much lower on my new historic, time to kick it up a notch.