On Sun, 25 Apr 2010 00:30:20 -0500, Richard J Kinch
wrote:

Searcher7 writes:

Is any gain is speed or possible accuracy really worth the cost that
these go for?

One problem is that they are longer and thus further out from the
headstock. Thus there is a progressive loss of precision and rigidity
which trades off against the added precision of centering. The smaller the
lathe the worse this trade-off becomes.

My Buck Adjust-tru chuck is no longer than a similar-size Rohm. If
anything it's a bit thinner.