I'm in the process of building my own overarm blade guard/dc setup. I've built the blade guard based on the plans on Badger Pond/Woodcentral. I've seen some other setups, and some use aluminum for the pivot mechanism and some use light gauge steel. The overarm leg will be steel. Will it be overkill (weight wise) to use steel on the pivot portion, or would it be better to lighten up everything and use aluminum? I plan on using a wye in the DC line below, reducing it then down to shop vac size, then running shop vac hose along the arm over to the blade guard. Thanks. Greg