Originally Posted by
Ziemas
That a ready solution flashlight you linked to; nothing to do with a build kit. It is a canned solution, and a cheap one.
That's is my point, it's using the 3-LED Cree 3-Mode Regulator linked above for $28.27, I suspect it's not in the same league as the Wilma or 600L. Thus it's not for me.....
You asked "What exactly is the problem that you have with it?"