I don't know that "success" is the right word to use in this discusssion, Robert.
There are clear tradeoffs to be made between running a CT or a MT. If one desires optimal handling under all conditions, but most particularly in the turns and twisties, the MT will, for the most part outperform the CT, although I found that on my VTX 1800s, the CT stayed glued to the road surface in performing through hard, powered curves where the MT had a tendency to break traction.
MTs do require significantly more rider input, i. e. countersteering, when turning. Their larger contact patch and flatter profile will cause the tire to "grab" more when you encounter pronounced camber in the roadway, on raingrooved surfaces and things like steel-grated bridge surfaces. The CT will be somewhat more squirrelly on loose, unpaved road surfaces such as dirt and gravel.
For me (based only on CT experience with my big Hondas) the advantages far outweighed the disadvantages of running a car tire because the necessary adjustments were just not that hard to make or deal with - once they were factored in to my riding style, they became rather second nature for me! Better traction overall on wet and dry paved surfaces. Better hookup with the road. More stable and controllable braking (especially avdvantageous with the rear tire skittishness and rear brake grabbiness/lockup control issues that have been amply documented with th R3s). The intrinsic design/engineering features of the CT added a road cushioning effect akin to an augmented and more comfortable rear suspension. The right CT will provide substantial economies of both cost and longevity vs running a MT on the rear. A CT is distinctly preferable when piling the miles up on quality highways and superslabs.
That said, some folks find the disadvantages outweigh the gains. Others find the rider input accomodations, which are absolutely and always necessary to run on the DS, are either too alien, uncomfortable, tiresome or bothersome.
The only way to know for sure if this mod will work for you is to spend $150-$250 and give it a whirl for yourself. I know that you have already pretty much decided to undertake the "experiment" and I hope that you will find the results to your liking. If you try it and don't like the change it will only have cost, on average, 200 bucks to see for yourself. For me, that is an affordable change which is well worth the cost and effort!
