I really do not think any of the solutions offered would appease anyone that really wants real checkering done. One of the solutions offered was stippling, a long way from checkering, and doesn't offer anywhere the classic look of checkering. Same goes for the mechanical solutions offered, I have never used a Wizard, but form watching the videos and reading all I can get hold of the Wizard might come close, but would never be able to duplicate the look and feel of the checkering on a Weatherby rifle. Even the stamped checkering on a el cheapo rifle would look better. As far as the knurling, spiraling techniques, I just don't see that being anything like checkering.
Real checkering takes experience and the real tools. The tools are not that expensive, a beginner set can be had for less than $75. The experience? better plan on having a year of spare time to get it. Checkering on flat work is one thing, going around the top of a pen is another. If it was easy, you would see it on all guns and other sporting goods items. But it is hard, and time consuming to learn and do. You have to have patience, lots of patience, make that buckets of patience, or maybe barrels of it. While you are getting the patience, get a barrel of wood blanks, you will also need those.
I have a set of checking tools, well worn, and experienced, and I have yet to do good enough to sell anything I have checkered. Most of my experienced wood has provided heat from the wood stove.