I had a lot of trouble with the p-lead pickup recommended by the SkyView install. I have a single Slick plus Electroair. In order to analyze the problem, I purchased a portable digital sampling oscilloscope and captured p-lead waveforms in flight.
What I found was a complex, variable amplitude waveform that depends on external factors... Compression ratio, Cylinder number RPM, MAP, plug gap etc. a 'one size fits all' resistor value did not work.
Since I get juiced by solving technical problems, I decided to develop the P-TACH magneto p-lead pulse stabilizer. (see link
I posted the design as an Open-source project, but it can procured as a completed device. I think the variable reluctance sensors that mount to the magneto are fine as well, as long as you want to run the wires.
Something this simple shouldn't be so complicated and 90% of installations don't seem to have probems. The rest of us have that odd combination of circumstances that require help.