Finally got the DoyleSpirals.js node to work.

The problem was that I had an old version, renamed DoyleSpiralOneArm.js in the extension folder, which functioned partly, and one misnamed variable in the DoyleSpirals.js file, r instead of rMaster. (The old version loaded in the menu as DoyleSpiral.)

(apparently) nodeeditor scans ALL of the .js files in the extensions folder,

so somehow the functions in the old version were interfering with the latest version.
Or, more likely, the old version was running instead of the newer version?
Every time I edited DoyleSpirals.js and copied it to the extensions folder, nothing changed or improved. A few hours of wasted time, but educational.

I finally changed the values of p and q from 3 & 8 to 4 and 6, which revealed that the old version was running.

So a suggestion woule be to get rid of old versions in the extensions folder,
and make a visual modification to the newest version.

- Brian