Hi C-H,

it's hard but you can do it [Linked Image]

i agree with your fact of the mechanical stress on the terminals.

but i think its OK touse solid ones for 1,5 and 2,5mm² house installs. They are easy to use with the clamp-terminals (there are even Breakers with cage claps at the load side now), and 95% of Schuko outlets and light switches sold today use this system. Although i heard you may use stranded wires in these, i wouldnt trust it.
using stranded wires on screw terminals, most do-it-yourself enthusiasts would use them without ferrules, damaging the copper and making the terminal a hot spot. i have seen horrible things with these from selfmaking guys. banged the screw into that terminal and cut 75% of the copper strands.....