On the Silva T-plate what you can do is cut the frt side of a .063 Tbar and use it in place of the plastic ones you can recess the screws in the bottom just be careful and it works fine and you'll never have to replace it unless you hit hard going straight.

I have seen a Silva T bar break He was running either an 8 or 9 turn and got a glitch and went straight into the wall almost under full power.