some thoughts from a newbie
I am travelling this week so my straight is home and I'm using a Mach3. However, I find myself using the techniques learned for str8ght shaving and I am now getting much closer with the M3 than I ever did before.
Next, I noticed with my str8ght I shave much closer on my cheeks than on my neck. My neck is where I obsess over the stubble. Can't really feel it on my cheek now.
Last, I found a combination of stretching, angle and super light touch on my cheek was what worked there. Still working on the neck. It may take a blow torch.... All kidding aside, I think the light touch was what started working. It is not pushing nor even scraping. I get the blade very close, and almost let it float through the air that works. I can't seem to even approach it on the first pass (wtg) but after I have gone back it (either xtg or atg) I focus on angle, stretching and barely touching.
Good luck