The Lansky is a waste of money, mines collecting dust in my shop. I'd take that money and put it into a better system like an Edge Pro etc
I have owned and used a lansky system for over 25 years???
I definitely got my money's worth out of it.
It has its limitations but will do the job.
It is less handy with larger blades.
Especially something like a khukri with "non parallel" spine/bevels.
(By that, I mean, my hand made Khukries don't appear to have much flat, parallel spots to reliably attach).
I do not use my lansky much at all, these days.
I broke it out to reprofile a custom Kwaiken, which turned out to be a very poor decision (it was a knife with no choice at all, and I buggered/cut into the plunge while not paying enough attention sharpening and watching a show in low light).
I tend to hand sharpen these days, either on a set of diamond hand stones, wet stone, or sandpaper on a mouse pad.
Or a Spyderco set of ceramic sticks. (These are not great for reprofile at all!!).
I also have a 2x72 belt sander to reset an edge if damaged (I don't do this much on nice knives, or customs, because it is a high speed, no variable speed, and 3000 rpm is not good for keeping edges cool, particularly the tip).
I advise people to other systems like, rather than the lansky if they plan on sharpening larger knives.