What method works best for going under sidewalks? I have tried the long flex drillbit thing, and that works ok for smallish sidewalks 24-36". I've never tried it for 5 footers, and I've bid a few jobs where using the expansion joints and caulking over is not really an option due to brick trim. have any of you guys tried the various sidewalk stuff out there? I remember reading a thread about a fitting on a piece of pvc you hammer in, and someone else mentioned a hose end fitting that worked with water. What works best for Low voltage cable, running one or two 10ga?