Perhaps a X6 with a copper heat sink? Or did you mean a tube light?
just hoping someone will start a thread for it elsewhere, this oneās not the place to go off track
lol, then why not just start one silly.
Now that I know what I know. I may go ahead and order the convoy s2 host that goes along with the spacer I already have. The spacer really seems an important factor. Chopping it to fit in the a6 seems like the wrong move. (But I may get impatient and try to finalize this thing. I want some beam shots!) 
RMM already builds an s3 tube triple so it must be working well for him.
And thanks for your help Tom E! The only thing I have any business doing is soldering - and even that has been a learning curve! I really didnāt do a lot of research before I started modding this light. I emailed RMM one time but really didnāt read many threads on triples before starting.
EDIT:
Hi have the longer copper spacer (for the S2) and put it in a S8 (which used the same pill and reflector as the S2). It seems to handle the heat much better than the S2+ spacer I used for the BLF A6 triple I madeā¦much better. The BLF A6 triple got hot much faster than the S8.
QUESTION! Does the shorty tube fit a protected 18350 cell? KeepPower P1835C 18350 900mAh geschĆ¼tzte wiederaufladbare Li-Ion Batterie Sale - Banggood Deutschland sold out-arrival notice-arrival notice
Nope!
I have tested that particular cell and it is too long for the short tube.
Are you able to recommend me a capable battery for the shorty? I wan max capacity and max discharge. I dun care if it protected or not! Thanks! 
KeepPower (unprotected), Efest, NiteCore and Xtar are all good choices.
These are 18350 cells right? Not 16340?
Yes, all 18350.
THANKS! 
Thanks! So youāre saying that you built an s8 triple or you used the spacer from one? I wonder what the difference is.
Or did you mean you used the S2 spacer (the long one ā not the short S2+ spacer) and put it that spacer in a Convoy S8?
Hi guys, Iām sorry I was not clear. I used the longer spacer for the S2 and put it in the S8 host. The S2 and S8 used the same reflector and pill.
The convoy must be better at shedding heat. Must be the pill. It looks more heavy duty than the shelf in the a6. Thanks again tristanxoxo!
If a light gets hot faster at the same drive current as another with a similar mass pill it means itās conducting heat better not worse.
and a similar path ā Iāve been wondering why the inside of the X6 head is so empty, for example.
Does the A6 with the S2 pill conduct heat out to the exterior as effectively? Need foil wrap added?
Thatās the point. If you have two similar hosts(S2 & A6) both with similar copper spacers added running at similar currents the one that gets hot quicker has a better path. The heat is reaching the surface faster. To āhandleā it better, ie have just as good a heat path yet stay cooler one would need to either have more mass, more surface area, or have a bigger mitt wrapped around it.