There is an extra cost if you want paper instructions, as explained above Darren. Small AM businesses like mine are balanced on a knife edge regarding profits. I make the kits as inexpensive as I can, with an extremely narrow profit margin and every additional cost inevtably has to be added onto the kit.
As explained, this is an issue of cost for me, if I offered free paper instructions, people would take them anyway in order to avoid having to print them themselves, which would push up my costs and the price of the kits
As I said, only one other person has ever complained about this, and only one other person (other than the customer and yourself) has ever enquired if paper instructions are even available (free, at cost or otherwise). Based on this experience I am inclined to think it has not damaged sales of my kits in any way