the edge pros are really really good. I have the Pro model (got it years ago) and was one of the first to come into the UK courtesy of an american-run outdoors supplier who may not still be trading (he kept upsetting people in the knife& bushcraft worlds). On the plus sides for them they are very easy to use, extremely accurate (which is more than half way to being able to get a good edge), infinitely adjustable with angles and grits, with some modification can also do serrated and convex blades, has jigs to do chisels/planes/scissors, etc. On the down side there is obviously the high price (the pro models are individually handmade, but I think the Apex is small production runs), the small and expensive stones (the waterstones are only 5mm thick so wear fast) and the stones are hard to find in the UK (though you can improvise
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But, as suggested, there is a way of building your own
try searching on BB for sharpening jigs and edgepro type systems. I seem to remember somebody built one that was a billed a s"edgepro on steroids" and was homemade. If you are feeling creative andf have rudimentary wood or metal working skills, the edgepro Pro is a doddle to make. I've been thinking of making one to hold larger stones, but haven't got around to it yet
I soon realised that the stones were too pricey and too short lived, so I don't often use it these days. Instead I just learnt to sharpen freehand on stones as accurately as I possibly could. Now I can get my edges almost as uniform as the edgepro (when I'm concentrating that is) and it's faster and much cheaper.