Willis has another post on Solar Cycle forcing over at Watts Up With That, the Ice Box Heats Up. He is using the same data, 65N (0r 60N) insolation and different methods and coming up with about the same results. Imagine that? He can probably do a couple hundreds of posts using the same data and different methods and come up with about the same result. I would even expect it is "likely" he will continue using the same data and different methods and come up with about the same results.
65N is and above is about 3% of the global surface and last I check we live on a sphere. When Milankovitch proposed his orbital theory of the Ice Ages he decided that 65N was the go to insolation band to support his theory. Thanks to that 65N has a comfortable place in climate science tradition even thought it tends to cause problems with Milankovitches theory.
Now if we stick with the electrical analogy, ocean heat capacity would be similar to a battery which would help filter the output of the bridge rectifier.
With the rectification, you should expect any combination of frequencies in multiples of 10 kyr +/- 2 kyr. There is no need to "explain" the lack of 100,000 year Milankovitch frequencies because there is a perfectly good reason to expect 90kyr, 100kyr, 110kyr etc. etc. etc. because the "system" responds to the "forcing".
I didn't use Willis" Huyber's geological time source and don't care to because I have other irons in the fire. I also don't have meticulous attention to citing detail because all of this is just a Google away. If anyone is concerned with solving problems instead of creating them, I am more than happy to provide as much detail as time will allow.