I'm currently looking at adopting one of these systems. What do you currently use, if any?

I am reading the VIDEC system at the moment. I have read through it but i cant quite understand how the graphs are used practically. Moreover, I am worried i will struggle with the testing due to the equipment i have and potentially waste 24 sheets of film.

I do not have access to a densitometer (still looking) and I use a Pentax spotmeter V with zone VI modification. My main concern here is that my light meter is not electronic. Has anyone tested negative densities with one of these meters? How did you find it?