I was only called Mr. Wizard once (at least at a distance so that I could hear it).  I consulted with a small condo complex that had a very bad iron and manganese in water problem, and the 2 inch diameter water main was impossibly restricted with thirty years of accumulated sediments.  They had no water pressure and lacked the funds to dig up and replace a thousand feet of pipe.  The alternative was to use an ice pig, but in the US the method involves the use of a million dollar tractor trailer size slushy machine.  

I used a modified 5 gallon Pepsi syrup keg (Coke kegs were more expensive on eBay), my air compressor (no charge to client), a food processor (to chop up ice),  100 pounds of ice, and a gallon of propylene glycol.  I called the health department to see if I required any permitting, and they said the vendor had all necessary procedures (news to me, since I was the vendor).  In eight minutes, the pig cleaned from beginning to end of pipe.  And for eight minutes, a rich chocolate fondue of material came out of the drain line.  We repeated the process because we had the ice, and the system has been great ever since.  Total expenditure was less than $150.  I am Mr. Wizard to that condo association.  

Until Mr. Fiddlerman pulls the plug on us, this forum had got to be the next best thing.  I cannot believe how much I have learned about violins in the past few months.