From the Nichia 219C thread post #168, SciFiFreak showed it coulden’t take the high amp of the Nichia 219C triple. But the real problem is, it is not an omten…… really why not have an omten?
In my eyes an omten is as essential for a reliable or even possible high amp builds as an DTP mcpcb & a high drain cell.
And djozz, there is many reported failing of the no-brand switch in the UF-1504. Everyone can decide for them self, it is a cheap part with good enough performance & a certain level of reliability, so why use anything else & more importantly why accept anything else when they are available?
The big omten’s seem to be hard to source nowadays & the KANG-28 seem to be so far just as good, BUT that is the only instance i know of so far when this is the case.
Honestly i am a bit surprised this is even a question, the importance of a reliable switch (the omten) is all over this forum……… :~
If we start to accept noname switches in these GB i see that as a step back on these high performance GB’s, if we can find anything better than the omten that’s great 
otherwise why settle for less than good enough?
These manufacturer really don’t save any money by skimping on the switches it will just lead to more refunds & disputes from failing lights.
And you organizers of the GB’s will get more grief from users with lights that have issues so why chance it 