I have owned a Hartke Hydrive 4x10 for about three years. During this time, I have had to replace the casters multiple times, and the caster sockets a couple times. I'm looking for something more durable than the Ernie Ball casters which is what I have been using and what the OEM casters appear to be. Does anyone have a better suggestion that won't require modding the cabinet i.e. not having to drill additional holes? Perhaps a better quality plug-in caster? Thanks.