There was a thread here a while back talking about keilwood. It was pointed out correctly that the term was coined by one cue supplier to describe his torrefied maple wood. Like Kleenex describes one company's tissues.Are you able to buy the blanks at different grades? I'm sure there is some type of certification to be qualified as Kielwood.
So technically in order to be "qualified as keilwood" it has to come from him.
I personally have built many torrefied shafts and even more hard maple and at 600 fargo speed I frankly can't feel any difference based only on the wood. Nor is the torrified wood necessarily lighter. But it does accent certain cues nicely in coloration. Not saying science doesn't say they play different but I sure can't feel it. And just like hard maple some blanks have the "it" factor and others don't. It's still a god made product with huge variations.
And I use CNC to taper all my shafts. Very easy to make minor adjustments this way.