Thanks John, your comments about the quick change toolholder have probably encouraged me more than the fact that you have made the grinding rest. This because the rest is very popular whilst to my memory you are only the second person I know who has made them. I have been thinking of making a video of it being used to publicise it more.
Having come from the electrical control systems industry, particularly employing large variable speed drives, I have been used to change , and often. Even going back over 60 years I saw the changes happening. Ariving at metalworking I soon learnt that the metalworking individual was far less likely to look for other ways for doing things. In many cases, a 2014 vice is probably not much different to a 1914 vice.
I probably get away with my grinding rests as there is nothing like it commercially, to my knowledge, the options being a fully fledged tool and cutter grinder or one of the simpler rests mainly aimed at the wood working fraternaty.
Unfortunately, I do not want to end up as Harold Hall, the man who designed the cutter grinding rest, but I will not be here to know.
If there is anyone reading this and saying, what "Quick change toolholder", look here- **LINK**
Harold