Gene    Use Jims advice. I've done this many times installing Yamaha's large brass casters in the bottom of vintage Steinway legs.  Jims idea is what we do & it works slick. The Yamis have a tapered caster shank & after the hole is drilled we use a rotary rasp in a air die grinder to finish the fit.  It doesn't need to be a machinist fit either. Just quite snug.... realizing that you  also have four long screw to give it support.   Dale Erwin <div id=AOLMsgPart_2_652f7b94-2c74-45db-b0a2-79d40ba5289e> <BLOCKQUOTE TYPE="CITE">Hello list, I have been trying to modify three legs for new casters. It required that I cut the legs short by 1.2 inch to maintain hight(done). In addition it requires that I enlarge the existing  .86 inch hole to 2 1/8 inch at .25 inch deep. In addition the existing .86 hole needs to be deeper by 1.5+ inch but it is oversize by about .085 inch. I have tried using my drill press and a forstner bit for the large shallow hole but could find no way to secure the leg enought to get it started. </BLOCKQUOTE> Gene; Try plugging the hole flush with the old surface....then you will be able to hand drill appropiate sized holes without bit wandering....worked for me. Jim Bryant (FL) ************** </div> <div id='u8CACD5CC4CA834F-1FB8-98D' class='aol_ad_footer'><HR style="MARGIN-TOP: 10px">It's time to go back to school! Get the latest trends and gadgets that make the grade on <A title="http://shopping.aol.com/back-to-school?ncid=aolins00050000000007" href="http://shopping.aol.com/back-to-school?ncid=aolins00050000000007" target="_blank">AOL Shopping</A>. </div>