[Bill_B]

You may be working on the control board separately from robot construction, but eventually the board and robot will get together. You know that not all drilling will have been finished on the robot at that point. Serious precaution should be taken to prevent metal chips from that drilling from falling into the electrical innards. Vacuuming afterward will NOT guarantee removal of all of those pesky bits. Debugging your control programming is hard enough without the uncertainty of electrical integrity. Think of these little gaskets as safety glasses for the cRio.