I don’t think I need to address George’s post and thank you for your reply; it covers everything that needs to be said as dose John’s.

I too have the same questions as Robin, I don’t know a great deal on this topic but I would like to do some engraving at some point.

So yea, great little product, if the spring is setup for working with Ali, would it be an option to supply other springs, as like a set for working with different materials. I’m guessing you would have a great experience in what works and what doesn’t, could also be an “Additional” nock on sale for you as well, dose the current version lend itself well to swapping the springs or would you need to rework the design/construction?

I’ve watched the video on your eBay listing, the results look good. Below is a pic of a tool another member was working on, I’m not sure how far they got as they are very busy with other things at the moment, I’m just showing you for interest really nothing else.

Cheers,
Lee