Don't like the clamshell clamps, not just because they look ugly to me, but because they only use 1 bolt. So an attractive expensive OTA is IMO inadequately secured in an unattractive fixing - put heavy accessories on the OTA, the single bolt and single tube holder has more load to bear.
The photos above with 2 tube rings, I consider minimum safety. My own 2 Taks, I use 3 rings on a Losmandy D bar, which is also easier to slide in its clamp than loosening rings bolts and moving the OTA on its own.
The GEM in DD's vlog is cool. And I am a book & atlas fan, Burnhams still rocks!
Putting appearance aside your fear of using a single bolt fastener for the clamshell is poorly informed. I don't recall the size of the fastener in the clamshell but even a very small M4 fastener of the cheapest class 4.6 material will need at least 58,000 PSI before yielding, not failing! I'm pretty sure Takahashi would use at least an M6 class 10.8 fastener for appearance and ease of handling, the fastener cost difference is trivial.
In fact it is not possible to load the tube holder with enough weight to even minimally begin to stress a tiny M4 fastener let alone the likely much larger size Tak actually uses in their clamshells.
Functionally the single fastener tubeholder adjustment when used on a Takahashi mount as designed, is much easier to use when balancing the optical tube in the tubeholder. If a Takahashi clamshell is used on a Losmandy dovetail IMO it's easier to slide the dovetail to achieve fine balance which is why I closely balance the optical tube in the rings and use longer dovetails.