I agree the techno dud is a great tip. I’ve tried all the Ki-tech tips and my favorite two are the medium soft and the dud.
I know the ping sound you’re talking about and I love it. For me, a medium about halfway gone gives a good sound and they play great. Unfortunately, the LD shaft I’ve been using for a couple of years now is missing that solid ping that I liked so much with my solid maple shafts.
My only complaint is that the tips blow apart somewhat frequently during installation. I love the tips when they’re right, but the issues with install are trying my patience. I contacted Chris this last go round when one of the duds I bought blew out like an accordion and he said they have a 2-for-1 replacement policy if the tips fall apart like that when installed correctly. I was told two more duds would be mailed out within the week. That was....about 6 months ago and nothing. I was also chosen to demo his medium soft before they hit the market but, alas, it never arrived. My last order arrived incomplete, although they were quick to fix that.
Like I said, I love the tips when they’re right, but because of the issues I’ve had with install and...other things, I’m currently exploring other options.
Good luck!