I built an ER40 collet set up for my SB10K and it works fine for what i do. I don't think its as accurate as the 5C set up on my SB10L and you can't get sq or hex collets for the ER's. Have you checked with Clausing for a new set up? bet they aren't cheap either...Bob PICS>>>
http://groups.yahoo.com/group/southbend10k/