(conventional straights honed by Lynn and stops are in the mail)
I have a narrow beard running along my jawline into a goatee. I keep the upper and lower line "straight edge" straight.
I've been using a straight that takes the "persona" cartridge blades. From descriptions here I don't think they're anywhere near as sharp as Feathers. I also looked at the edge with a RS microscope and there is a very distinct double bevel on these with very distinct hone/grind scratches on both bevels.
I generally shave only WTG and occassionally XTG on my cheeks. I shave down to the beard on the cheeks and down from the beard on my neck. I paid attention today and observed that I keep the line under my beard by coming into it at almost a 90* angle. Then almost immediately after contact and starting the stroke, I go to about a 30* angle as I stroke down my neck. Coming in at a shallow angle either takes off some of my beard (1/8" to 1/4" long) or the line gradually moves down my neck over time.
This got me to thinking that maybe some variation from the "standard" edge, through honing or stropping or both, might be better suited for this type of use/technique? I'm very used to these crappy blades -- often takes multiple passes, sounds like sandpaper, etc -- so I probably wouldn't have a problem sacrificing some comfort, efficiency, or forgoing the BBS shave in order to maintain the line on my beard. Any thoughts on this?