Jon, how about a topic, yet to be named, which is a depository for suggestions for a tool that "should" be made.

It is not uncommon for me to need a tool which I have never see before, I don't know the name of, I don't know whether it's commercially available, or whether it even exists.

This would allow one or more of us to advise if such a tool even exists and if so suggest where one might be for sale.

An example is a tool to countersink a drain hole say on the inside of a thick steel plate tank which is fully enclosed.

The need to countersink the inside surface of the hole is to allow the tank to drain absolutely completely, the hole having been drilled after the tank was welded up and fully sealed.

Such a champhering tool would be collapsible to allow access through the hole from the outside then expand to expose a cutting edge for removal of the inside burr, only to collapse again for withdrawal. I hope this example is clear.

Anyway my suggestion is a topic where requests for a tool such as this, and of course any type of "unknown tool" can be discussed.

What do others think?

Bony