Many thanks, good advice. I'll check both.
Something is definitely up as I've loaded it with as much preload as the spring will take without failing to cock and it's putting out 10.4.
http://i1167.photobucket.com/albums/...psydfb8gbi.jpg
Plus,
http://i1167.photobucket.com/albums/...psqqijftuz.jpg
I'll get some more grease on the guide and check those batteries.
Thanks again.
Rob