Yes,
the centering ring coincides with the new No PWM circuit being used in the latest release by Lumintop of both Tools and Maratacs.
The GB Tool will have a No PWM circuit, and will have the centering ring. The driver will be different, but the copper body will look the same as earlier Tools that came without the centering ring, and used PWM.
The new Lumintops do NOT use PWM and yes they have the centering ring in the reflector…
I hope that is more clear… fwiw, these are my opinions, based on my experience and research. I am not officially involved in the design of Lumintop Tools, I just buy them, test for PWM, and report my observations.
imo the Group Buy Lumintop Tool is the ONE to get, IF you value No PWM, High CRI, and a low of 1 Lumen.
if otoh, you are into Max brightness, then dont buy an N219 light. In fact, buy a Maratac, they are brighter than the Tool (if you are OK without the clickie). Or get Vinhs custom Tool that uses LiIon
and btw, do NOT use LiIon in any version of the Tool, nor in the Maratacs. (Except the ones with a driver Swap that Vinh sells.)
Hope that helps clear up the various versions and options
I personally am very excited by the Group Buy Tool features and have ordered more than one. I expect the Tool head will Lego to my Copper Maratac, and vice versa too.