Wight,
Thank you for help.
I read “Understanding the difference between Linear, Buck, Boost and Direct Drive drivers” at Understanding the difference between Linear, Buck, Boost and Direct Drive drivers
And I think I follow most of it. but I think the new MT-G2 and XHP emitters are all exceptions to his conclusions about design number limitations do to the higher needed voltage.
I looked up “17mm & 20/26/27mm single-sided DD/FET driver release: A17DD-SO8 / A20DD-SO8 / etc” at 17mm & 20/26/27mm single-sided DD/FET driver release: A17DD-SO8 / A20DD-SO8 / etc regarding the “BLF17DD V1.0”
And “BLF17DD Info Thread - Reference” at BLF17DD Info Thread - Reference and frankly I am more then a bit lost.
I know that old-lumens took a tk35 clone and stripped the boards and made it 2p and put new stuff on the board but that kind of work is above my skill set. I liked this host better because unlike the Small Sun zy-t08 this host is already 2S.
I can solder a jump wire or resistor onto a board (I know big deal 
. I know that the TK35 Clone is a very different size and configuration then say the typical C8. so how do I get one your recommended drivers screwed into the TK35 clone? each of the two boards is screwed on with four screws. Do they come in this configuration?
From one of the postings I saw you have had your challenges upgrading wiring. If the design goal was to push “HI” to 4-6 Amp range I think (but am not sure) that 22 gauge silicon as shown in the post above should be sufficient. What do you think?
My understanding is that some work has been done to develop a good 6V Driver but I do not know if the design has a consensus yet or if it is available in a screw in configuration for this host, that to me just screams for a MT-G2 emitter to make a very usable all around light.
ANY help is appreciated.
Kevin