Steve,
A most interesting post. I am pleased to read that you are continuing to share your extensive knife sharpening experience. Among my life treasures is my Cub Scout knife, a gift from my grandparents sixty years ago.
I will look more closely at my T4. My preferred carry method is with the grinding wheel removed and everything placed in a bowling ball bag. The grinding wheel, in its box, is placed flat in the bottom of the bag. The T4 sits on top of the boxed grinding wheel. (For more regular, long term use, something like a Rubbermaid or Tupperware continer would work better; the wheel may have retained dampness.) There is plenty of room in the bag for Tormek accessories, including a Spyderco Sharpmaker. It is surprisingly comfortable to carry with the shoulder strap, and only cost $32.
I will check into fairing the edges of my handle.
I replaced the nuts on both ends of my T4 shaft. They both seem adequate for general use, however, I frequently remove both the grinding wheel and the leather honing wheel. (I have four grinding wheels and two leather honing wheels for my T4.) Except for being slightly shorter, the EZYlock shaft on the T4 is identical to the T7/8 version. The heavier steel EZYlock nut and the quick release nut for the leather honing wheel are both perfect fits. I replaced both. I should state that neither failed; the quick release is more convenient and the steel EZYlock seems more durable.
As I recall, the T2, a very specialized model designed for restaurant use, uses a tapered wheel in place of the leather honing wheel. I will look into the possibility of adapting the larger T7/8 leather honing wheel to the T4.
Have you tried using the extra fine rods with the Spyderco?
Steve, I think your BSA day offers valuable field trial for anyone interested in using the Tormek in a camp environment. Having watched you sharpen, I find your 1:10 time both believable and sustainable.
Ken