I should be cutting some more 150 Bamboos this weekend to send to Mark. PM me if you just can't wait.
Rick - good answer! Thanks for 'stepping up to the plate'
Raibeaux - two days on any stone is way too much - especially on a soft knife like this. With an Atoma 140 + 150 Bamboo this task should be measured in single digit minutes, not hours.
If you've gone a bit more acute then the steel will hold - like 15 on this knife, just switch to a coarser angle like 20 degrees. You don't have to convert the entire bevel to 20 degrees - just put a small microbevel ar 20 degrees on the existing edge. This isn't a knife that will hold an edge for a long time anyhow so over time you will convert the bevel to 20 degrees. A bit of thinning behind the 20 degree angle will just make it cut better.
Try to square up the bevels on the 2 sides to be equal, but before that try cutting with the knife. If it cuts straight enough for you without twisting or steering the blade - don't worry about it.
I use the sharpie and a FINE grit stone for angle testing. Typically I use an old 8k Glass stone that I dropped for this. Just a swipe or two will remove the sharpie and let you know where you are - and this much grinding can easily be swept away once you have decided on your angles.
I try to generate as little burr as possible. Note that when you put a microbevel on an edge that is close to generating burr, you essentially force a burr in a couple of strokes. I can go into that comment a bit more if it doesn't make sense. When you are doing this microbevel at 20 degrees you shouldn't have to use a very coarse stone.