Hello.
We are using several slabs of steel (about 200x200x10 mm) as fixtures and pressure plates to attach each workpiece to a pallet. It works nicely, but they are heavy (over 10kg) and when changing workpieces it is really strainful on the shoulders. We could machine out excess material, but my boss fears that it will make them weaker and they will eventually start to bend. If I start drilling holes to them (about 8mm deep, for example), is there some way to estimate a safe distance between drill holes and drilling pattern so that the integrity won't be compromised in any way?