Thanks for your interesting suggestion Brian. Certainly food for thought. There are just two pre-1950 non-commercialised vintage British spring air pistol designs remaining for me to tackle, and if I can complete these successfully then I would feel reasonably qualified to write something that could be published. One patent is by Lincoln Jeffries and the other by Frank Clarke Lead Products (probably intended to be their Thunderbolt Senior), and I have made a start on the first already.

Then of course there are the American patents. Enough to keep me going until my lathe packs in!

Once the workshop has lost its appeal then it will be back to writing my second edition (full colour) of the ESAP.

Regards
John