To answer my own question, Dwayne @ Bavarian Heritage Werks, Portsmouth NH,  is doing the removal and shipping it out to Oshmo for the milling work.   

Thanks for the follow-up.

Like sparkplugs and Never-Seeze, there are numerous costly problems that can be entirely avoided by very small and inexpensive preventative measures. Case in point is the rear drive splines. All that's needed is a light application of a tenacious , water-proof grease to make these splines last forever... and more importantly, to insure that the rear wheel can be removed when needed. Obviously, some greases are more desirable than others. But when in doubt, any grease is better than no grease. 

The point is, the rear wheel needs to be removed at least once a year. You can combine this task with rear tire replacement or brake inspection. But before the wheel can go back into place, there's the requirement to apply new lubricant to both male and female splines.

Hope this helps.

     Word Wobbly, No complaints, with 120,000 mi. on the gears it was due!