The problem I think is in how the game handles weapons grades. They aren't unique, but each weapon model exists on a 1 to 100 scale, with meitou at 100. Edgewalkers are at 70, 75, 80 respectively. My original attempt had each grade of cybersmith at similar round numbers. Which is fine for vendors and loots spawns, but it does affects how you can smith the items.

As far as I can tell, the quality of the home made items depends on the smith's skill level, and the relative level of what they are trying to smith. A crap smith can't smith a Edge Level 1 blade even if you have the research for it. Their chance of success is so low that they always fail. Also, they appear to need the same level of smithing as the level they are trying to smith. So my original cybersmiths had 80 for the top tier, same as Edge 3. What happened when you tried to smith an Edge 3, it would only produce a Cyberpunk 3, because of the formulas for success in smithing. It seemed to overwrite the ability to smith Edge 3 weapons.

So i dropped the cybersmith weapons by 1 point, and tweaked some of the research levels, thinking that it would make it so that you could smith Edge 3 at level 80 and Cyberpunk 3 at 79. Sort of worked, but it still seems to make it fail. Not certain why at this point.

So as a compromise, I deleted the ability to make the weapons, as it seemed to be causing all the problems. You can still buy all the weapons and grades from vendors, but weapons manufactoring seemed to be causing too many issues for people.

I'll try making a unique smith for it, but I think that it will still want to fail to other types depending on the quality.

what you could do is make a separate add on for those weapons so if you wanna craft them then disable the mod which doesn't require a import that way you can still use the weapons as long as you have the original mod enabled. Are you able to set it so that only these weapons can be crafted at a newly added weapon smith? or make a weapon smith IV for these weapon grades? Cause I have seen some mods that do this. I will try asking around the Kenshi community discord to see if they have any suggestions regarding this as well to see if I can help you out.

what also could be happening is that you may not have the edgewalker craft/research combined with your custom grade researches as well which may be causing the issue of it being overwritten.