you should have washers
torque settings are
stag1 1 25 nm or 18 lbf ft
stage2 55 nm or 40 lbf ft
stage 3 mark the bolts with tip ex then turn them all quarter of a turn then stage 4 turn them all quarter of a turn again all marks should be facing same way
and make shaw you tighten them all in the right order which is
1 bottom mibble
2 top middle
3 second bottom right
4 second top left
5 second bottom left
6 second top right
7 end bottom left
8end top right
9 end bottom right
10 end top left