Hi Guy's,
JD's thread is very informative and a must see! Also check out Roland Friestad's series of articles in Home Shop Machinist Magazine. They can also be viewed at his site
www.cardinaleng.com.
I have been retrofitting both a Bridgeport 2 J and a Boss 4 and the Boss was much less costly because the 3 axis hardware is already installed and the only serious work is stripping the "old"
electronics and this is detailed very precisely in the HSM articles. You can do the whole retrofit
for under $1000. On the 2J The ground Ball Screw kit from Hiwin cost me that much. I paid $1500
for the Boss on EBay because their resale value seems to be less than the 2J. The BPretrofits are
great machines! Watching them run is awsome! Will Smith MV CA