I would like to doublecheck the bolt specification: What is the current strength category of the used bolt?We would prefer a strength category of at least 10.9, better would be 12.9. With strength category 12.9 the maximal torque for M3 is 2.16 Nm and offers therefore a bit of safety buffer.For M4 10.9 is sufficient, because it offers a maximal torque of 4.18 Nm.Is it possible to switch to this kind of bolt? Do you have bolts in 10.9 and 12.9 on stock?