Gustave Build : Woodworking router

[Gustave]

Hello Dean, thank you for this detailed and fast reply
#1 In France the smaller 209 hardener I could find is 1.45kg … any advice for another product that I could find in smaller quantity in france ?
150a for 5mm thick it is enough ?
#2 I will go on HGW (X and Y) carriage and 20mm rails, I am in contact with Fred, do you recommend the Hiwin instead of BST trade ?
#3 I will spread the Z carriage, the actual distance is 107mm. Could you give me a recommendation ?
#4 Do the resonance also occur with servos motor ? I have chosen direct drive to simplify the build and also read that good pulley system could be expensive and this assembly could introduce backslash.
25mm and 20mm pitch are uncommon no ? I think the max I found in the forum is 10mm. With such pitch associated with pulley reduction, do you think I could occasionally mill alu with enough precision ?
For the Z I keep 5mm pitch ?
I already bought a CSMIO IP-S and will probably go on servos.
#6 The clearance between the X carriage is 250mm, is it enough ?
#7 Could you advise a dimension of square ? I search “granit square”, it seem to be a very expensive