When you run across a well done article on a topic we all tend to need every bit of help on, well you share the link to that excellent bit of work.
I’ve had more trouble with winding toroids than any other aspect of kit building, excepting fussing with surface mounted components too small to see without a glass.
Mike VE3WDM has done an excellent write-up of how he conquered the toroid problem, with very helpful onwards links.
“VE3WDM’s HAM RADIO BLOG: Are toroids getting you all wound up” at:
Hope you find this useful!