[TR] modifying a reamer for carb shaft

[Randall]

> The reamer will still be turned in the same direction. The 
> difference is 
> that you will want it to cut from the shank end of the flutes 
> instead of 
> from the normal end. To do this, the back end of the flutes 
> must have a 
> shape with a cutting angle put on them.

Right, except the "shape" can be a simple flat at the right angle (or close
to it).  Look at the normal leading edge (tip) of the reamer for an example,
then grind the same flat onto the back edge, possibly with a bit more taper.
An ordinary whetstone will do (although it will take some time) and probably
be easier to control than a power grinding wheel or Dremel.

-- Randall