Eberhard Sengpiel said: "Even after you've 'finished your studies' you have to keep improving your recording technique and everything related. It's nothing but a lifelong process." (Link in German)

In 2008 I developed a surround microphone system that I call "XYtri". I presented it at the VDT International Convention 2008 (Abstract) and am building a small XYtri-website with detailed information and sound samples.

Why "give away" something like this?

A website of a collegue of mine states that he has developed a proprietary main microphone setup which records the natural ambience of the recording space. That's all he says, so if you want to know what it is and what it sounds like you'd have to hire him. Another has developed a proprietary system to enhance ambience in headphone mixes. He let's you listen to many samples though and markets it as a service he renders to potential clients.

My incentive is the belief that only by exposing a new technique can you get your (competitors or) collegues to try it out, hopefully give you feedback to improve the design and possibly set in motion an exchange of ideas that can only improve the quality of everyone's work. This is why scientists publish. Peer review is good! I have frequently benefited from other Tonmeister's sharing their knowledge and experiences, so here I go too :-)