Caution: NEVER transport gear with the casters in place unless you have a least one locking caster per unit, or you have rubber caster cups under the casters. Don't ask me how I learned this.
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)