the newer fences are great on the ridgids. love the one on my folding saw.It looks a lot like the fence on my Ridgid 2400 which is horrible! Maybe they've been redesigned, but mine is off nearly 3/16" from front to back consistently. It's the whole reason I'm looking for a new saw.
you extend the right table out and theres an extra table that fits in the gap which accommodates a router for use with the ts fence.i have the same fence on my gray ridgid ts2412. holds it's settings and is rock solid once adjusted properly and locked down.
the 4512 is a nice saw, as long as a unit without the "blade/miter slot alignment changing with blade elevation issue" is located. and what is "an aftermarket drop in for use with a router" ?
the 2400 is a job site saw and it's fence system is different from the one of the linked c-man.
the less than optimal fence system on older c-man 113s is quite different from the one on the c-man KS linked. the fence on the linked c-man, although not a t square like a bies or a delta t2, is nonetheless a first rate and eminently usable fence.