This is my opinion and mine alone. if you are going to do any type of production and.. are concidering a retrofit. you do not want a Bridgeprot Manual machine to convert to CNC. the issue is rigidity and repeatability. any Boss type machine can be converted with much less headache than trying to convert from a standard Knee Mill. and will be a ton more rigid. all the Ballscrews and limit switches ect are already there hooked up and working. you keep saying "get It Here" where Is here.
If the prospect of getting a boss machine and converting it is Intimidating to you then buy the converted machine you linked to. the boss style machine are out there. the other issue is time the longer it takes to get up and running the longer you are not making parts. the older boss machine had steppers and can be converted to run Mach3 quite easily.
I am doing a later servo machine which is a little more complicated....... but much less complicated than doing a full conversion from a knee mill.
also have you looked t the route 66 mills (they have a Knee mill conversion kit and conveted knee mills as well.
Just My 2 cents worth.
the bottom line is you want to do production of many like parts. weight and rigidity is your friend. now that being said the one thing you have overlooked about the tormach is it has a tool changer I believe.
a friend once told me that a cnc knee mill is 3 times faster than a Manual one and a machining center is 3 times faster than a cnc knee mill because of the tool changer. just something to think about.
archie =) =) =)