I've got the benefit mine is already set-up for servos, with some rather overengineered brackets/lumps of metal. It took me a while to figure out how to get into the main bearing support for the x-axis, to get the locknut of the end. to slide the table past it's normal travel. I'll take some pictures when I put it back together, but it consists of an extension shaft that extends the screw out about 8", with an additional support block/bearing, which the motor bracket is then attached to, with drive via belt.

I've got some pictures at Matchmaker - a set on Flickr

What autolube is on yours?
Mine has a Bijur TM-5 system. If yours has the same system, you need to hope the quill metering unit isn't blocked, as you need to take the head of to get to it, as it's mounted on the rear. I had to take the head of mine to get it in the workshop, so changing the metering unit wasn't an issue, but I still need to get the head back on, and it's not exactly light. Even with the motor and varispeed off, I can only just lift the main casting myself.

I've got a manual for a Summit toolchanger, but I think it's for a newer version, as the manual is for a changer with a single control board, whereas mine has 3 seperate boards. The tool changing logic isn't that hard. Regarding the tool selection, you just need the arduino to track where the carousel currently is, and calculate the quickest direction to the next tool. Once I get that far, I'm tempted to replace the motor and geneva mechanism with a stepper, and some optical sensors to speed things up.

Have you found a source of tool holders yet?