Mr. Brit,
This is a good topic for discussion as there are as many ways to sharpen, and it can be confusing & frustrating at times.
I had a difficult time at sharpening when first starting to do woodworking. Maintaining a consistent angle during the process was my number one problem, and I had a tendency to create a convex hump on the slope. I know there are sharpening tools available, like the clamping device with the roller on the back, and I purchased one. I wasn't a fan of it, sometimes didn't insert the iron at the proper location to get the full slope flat on the stone, and for touchup during use it delayed my work.
After experimenting methods, I've been using the sideways method. This can be seen in a YT video by Stavros Gakos:
https://youtu.be/lj9Dr8kvnOo?si=DdLkuxEEWH0KZvsQThis method allows me to quickly touch up irons and chisels while in use, because I find it much easier by hand to maintain the angle, and because of the width of the tool preventing tipping, I no longer get the rounding or convex slope.
Well, that's my two cents worth, maybe someone can find this useful.
Thanks for the topic of discussion, I'll be following for ideas.