Handles and Seats
My sugestion for the fit of the handle is whether you use a preformed grip [ NO ALTERNATIVE] or glued up series of rings that you develop the fit after you have finished developing the profile or adjusting the preformed piece. It is a matter of using a round rat tailed file and [OR] sand paper on a split dowel and lots of dry fiting. Rings of narow masking tape are quit acceptable if you find that you had to open up the bottom end of the handle further than you wanted to for the final fit and position.
There is usually not to much of a problem with the fit of the reel seat as you are able to mount it from the bottom end of the blank.
------ My .02 saltRon