Hi all. I am renovating my rig...I just removed an alum cone from my hartke 115xl and replaced it with an eminence basslite neo 15. (review soon). Now, I am looking for some high quality casters to place on the bottom of it. I really like the look and design of the carvin casters: http://www.carvin.com/products/single.php?ItemNumber=CTS35&CID=BA I'm assuming I just screw these in to the bottom of my cab? Will they fit my cab? Anybody have any better ideas? thanks guys!