Hi Steve, that video I initially posted just as an example of what spin grinding is...That particular 'Garfitts' grinder is absolutely nothing like the specialist machine my engineer uses to spin grind...and this guy just did all the reels for the 2011 Australian Lawn Bowling championships held last October here in Wagga. He is a perfectionist at his craft.
The grinding wheel on the machine my engineer uses is huge compared with that flimsy Garfitts outfit.

Now re 'blade thinning' or 'relief grinding' please read the facts and myths....Please click HERE this might be of interest for you... wink
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin