It doesn't make any sense to NOT drill the damping rods, as the whole idea of the emulators is to replace the small orifices in the damping rods. If you don't drill the damping rods, the emulators won't do anything.
One caveat: In several of the how to threads, the drilling of the damping rods is incorrect. This is the correct explanation of the drilling: http://www.racetech.com/download/Ins...GV%20S3301.pdf
See this post, # 4 here: https://www.tw200forum.com/forum/tec...emulators.html.
It's really not that difficult, other than the disassembly of the forks, which needs a dedicated tool, which there are several ways to construct.