I hate to be a contrarian but since broadhead sharpening is my business (as well as being a knife maker) and collector of knife and broadhead sharpeners and the owner of magnified imagery tools, I can tell you there is a good reason NONE (ZERO) knife and broadhead and razor blade manufacturers sharpen the blades they make in the direction a Rada or other "V" shaped sharpeners do. All knife and broadhead and razor blade makers sharpen/hone perpendicular to the cutting edge, not parallel to the cutting edge.
If you looked (under magnification) at the edge produced by a Rada or any of the other "v" shaped "drag through" sharpeners, you would understand what they very rough and jagged edge looks like vs a correctly honed and razor sharp edge.
I understand the appeal of the rada type sharpeners (especially on concave heads like Simons sharks, etc) because they require no skill to use and they are fast but the edge they produce has little longevity and is as jagged as the top of a tuna can (which is why you feel and hear the "chattering" as you drag your blade through the rada.
The jagged edge produced by a Rada “V” drag through sharpener edge (parallel to the cutting edge)
A honed edge (perpendicular to cutting edge)