Derek, mostly I've used a 1/8 inch reground from a 1/4 inch to deal with the
inevitable shmutz in the corners of dovetail sockets.  In addition to large case
pieces with large pins and sockets, here is a piece I did several years ago
using that modified 1/8 inch chisel.

http://galootcentral.com/component/option,com_copperminevis/Itemid,2/pl
ace,displayimage/album,lastup/cat,0/pos,0/">http://galootcentral.com/component/o
ption,com_copperminevis/Itemid,2/place,displayimage/album,lastup/cat,0/pos,0/

Apart from that, I'm looking at four drawers for a Pennsylvania slant-front desk
in the immediate future so I am very interested in knowing more about your
particular fishtail chisel, where you obtained it, and any particular further
observations based on your experiences using it.

Thank you.
John

John M. Johnston
jmjhnstn@m...
"P.S. If you do not receive this, of course it must have been miscarried;
therefore I beg you to write and let me know." - Sir Boyle Roche, M.P.

-----Original Message-----
Some prefer skew chisels. I find that these need a shallow angle (20 degrees),
otherwise you are forced to skew the chisel to slice a cut. Much better - my
preference - is a fishtail chisel. These just need to be pushed into the corner.
So much cleaner and less damage than a 1/8" chisel! :)

http://www.inthewoodshop.com/Furniture/TheLastDovetail_html_m3cc2ab80.jpg