hi gege2b, welcome to Dangerous Prototypes!
gege2b wrote:So much questions... Sorry about that :)
That's why we're all here!
gege2b wrote:Another question I have : I wish to panelize some board, using gerbmerge (not at all userfriendly, but seems very powerfull), does anyone have some tips & trick ?
There should be some useful information/scripts here:viewtopic.php?t=4071&p=44018
As for the other stuff, I'm not a KiCad user. brian wrote a KiCad tutorial
a while back, the values under the gerber section seem reasonable to me. I haven't ordered PCB's from Seeed, but I imagine they can deal with pretty much any standard gerber file.