I have both a Mimaki JV3 and a JV33 (both 63"). For years with just the JV3 we used a Mimaki CG-130FX cutter which worked great. When we got the JV33 it came bundled with a Summa S160T (bank repo's) so since the Summa has a true tangenital cutting head and wider width we sold the CG-130FX.
Both are excellent cutters, both have optical sensors. However - both need different types of registration marks. The type of registration marks is depending on what the cutter needs and has nothing to do with the printer. Your RIP or whatever you are using to create the cut path must be able to add the correct marks for your cutter for print/cut work.
We use Flexi pro which handles this very nicely. No idea on Rasterlink combined with whatever the cutter comes with (FineCut, etc.)....
That being said - the Summa does have considerably better tracking over long runs but even at 12 feet it's not going to be perfect every time. No cutter will be perfect every time on print/cut jobs of that length except maybe a flatbed. There is simply too much material having to be moved back and forth. Once in a while you will get a dead on cut on something that long but more often than not on print/cut jobs over about 6 feet it is going to be off some. Best to always build in a nice 1/8 to 1/4 inch bleed outside (and hopefully some solid bleed from the main design inside the cutline as well) the cutline when running a print/cut job that long for safety.
Or you could always hand cut. We have hand cut many very long print/cut stripe designs where we just have little room for error or being able to add bleeds. Not fun but you have to account for that when considering and quoting the job.
That being said - the Mimaki CG-FX cutters are excellent solid well made cutters. The Summa's are tad better. I've run both for years now so that is the opinion of an actual user of both. However on print/cut jobs I'm not sure what sort of registration marks are available for non-Mimaki cutters using Rasterlink.
By the way - welcome to S101. I'me just down the road from you in Columbia. Actually visit Gaffney about once a year - my wife was born up there and she has some family up there.