This is flat out the worse suggestion in this topic.

Why not just make repair kits with two restrictions: A reverse level cap and item type. Blizzard could make it so that you can't use low-level repair kits to fix high level items and you can't use repair kits for a different kind of items than what the kit was made for.

The reverse level cap is, IMHO, the most important restriction on the items -- if you don't have it, it would simply not make sense to make anything but the lowest kinds of repair kits.

If the reverse level cap is used, it could make it possible to make repair kits something you can make from skill level 1.