That was some good discussion back then.
My conical mirrors had terrible range limitations. I could not find a reflective enough paint. They worked at removing the 45 degree defense though. However I never did give up on the idea, and just this past weekend I bought a bag full of mirrored cones at a craft store for about $1.00. I will mod a Tamiya sensor with one of these and see what happens. The mirrored surface on these looks well done, so the range shouldn't suffer much.
However that discussion took place 3 years ago, and how much have we modified game play? There in lies the problem. "Don't fix what ain't broken". Guys are having fun with the system as it is. Simple to host, and police. Make it too complicated and it just gets hard to gain any traction. I know the Danville guys are using Dana's Idea of rotating the prism 45 degrees to stop all the tanks running around with their turret at 45 Degree to the enemy, which probably helps with the fan shot as well, Part of the defensive maneuver is to get your turret back to 45 degrees after you take your shot, so this tactic for defense also results in the dreaded fan shot.
There are a lot of Clark units on the market now, but I bet in most cases they are set to work just like Tamiya.
Let us know how the cone goes. I would love to eliminate the 45 degree and slope defense inherent in the Tamiya design. But for now we work around it. We discussed rotating the cone at Danville over 8 years ago but saw few benefits. How with the proliferation of TDs and many HEAT guys buying Jagdpanthers (and such variants) it was revisited and worked out well. As for the notorious fan shot or sweep shot it was eliminated years ago. Many of the ultra competitive tankers were unhappy but soon realized that they still had fun without it. We had a gentleman's agreement and it has been followed ever since. Much to the delight of RC tankers who wanted realism over wins. Come see for yourself. We have a great time