Hi,
I got a Fiama DRO to mod my K500 rip fence. To attach the FIAMA F7, I plan to add a 90 degree aluminum bracket on the inside of the rip fence housing protruding toward the rip fence scale on the saw. I plan to cut a small offset on this bracket in oder to fit it inside the rip fence housing. See picture below with the bracket in white.

However, I wonder which thickness I should go with. I believe 1/2 inch is what I am looking for the width based on how close the housing is from the saw scale, but the thickness I have no idea. I am looking at those aluminum brackets:
Any feedback would be nice,
Thanks,
Bill