Quote Originally Posted by BTDT View Post
Perhaps Eddie thought of the SP-5 as a production airgun, and the 'tuned' version (bearing in mind that 'tuning' at the time entailed sizing and polishing - essentially laboriously hand-finishing - components, and re-lubing) was the 1970s equivalent of today's 'blueprinted' airgun.
You know what ??? You ain't 'alf a clever old stick Sir Jim ... Yep, bet that answers the Q, a blue-printing service . Will sleep happy now . Night night ZzZzZzZzZzZzZzZz ...