There were a couple of guys back then that didn't like the median lines also...I'd post one and they thought I was posting something of the Devil...haha
That 50% rule...Is that the one where you measure between the high and low pivots for a pull back? I didn't read too much about Gann back in the day...just didn't seem to fit me back then with the wheel and all...I use that 50% rule all the time.
I always tried to keep an open mind when learning about methods.
Sp!ke