Thanks. That's indeed for portability.
I am thinking about getting a harmonic drive mount in the near future, and I would like to get a carbon tripod like CYG48 or even CYG54 to go with it. At the same time, if that tripod can also be used with EM400 (or same class of EQ mount), it will add versatility to the tripod and will make the cost even more justifiable.
In the mean while, form EM400, I had already switch from the TAK metal tripod to wood tripod, to reduce weight in portable imaging. This helped a lot when I brought my EM400 to the southern hemisphere two years ago. I still use the metal one in local public viewing events. In the case when a running kid hits the telescope, the very heavy TAK metal tripod can prevent the telescope from falling off. I see that CYG54's weight is comparable to the TAK wood tripod. So perhaps there is no need to use it to further replace the wood one. But again, having two equally portable and stable tripods interchangeable between the various EQ mounts is a good thing for me, given the various use scenarios.
Yes, if it is purpose of portability, I think it makes sense to add a new tripod such as CYG54.
In fact, I have several tripods for the same mount use for the same reason. Some of tripods aren't so car transport friendly and some of them are overkill for small telescopes that I use daily. I have various adapters to be able to use them on various tripods inter-changeably.
Here is size/height comparison of several tripods, tripod legs are set shortest.
From left, Astro Physics Eagle Pier, 8" and one 4" extension and Rainbow Astro's RST-300,
EM-400 metal tripod, CYG54G under the EM-400 metal tripod, Avalon T-Pod 110, 8" extension and RST-150H.