Actually, the logic behind Noel's MHEP is clean and straightforward. So it can be used to prove/validate other astrological concepts. I've been adamantly in favor of Placidus houses, whereas many people have tried to get me to switch to Koch houses. If Koch houses described me, then I probably would have become a college professor, which I always wanted to be when I was young. I did do a little bit of teaching on the college level, but that was not my career. The MHEP delineates my career very well and validates my use of Placidus houses.