The local supplier had a Sidewalk Sleever in stock for $100 and looked like it would do the trick going under sidewalks. Sometimes it is a pain loading up my 2310 trencher just so I can bore under just one sidewalk. So I made my own sidewalk sleever. I used a old boring rod that I had by welding some big washers on and made a tip in my lathe and welded the tip on also. The rod fits perfectly inside 1" sch 40 pipe. This is a 81" rod and I will make another rod that will be a 60". Once I use it I will report back on how it works.