I have used the heavy duty truck from Pacific Piano Supply and they work very well. They are _heavy_ tho and have big wheels. If that is what you want they are great. It doesn't lift the piano off the floor any untoward amount, but the big wheels are offset making it wider going through a door. Dave Porritt, RPT SMU - Dallas "No matter what side of an argument you are on, you'll always find people on your side that you wish were on the other side." -Jasscha Heifetz
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