I've got a honing guide....somewhere. Tried it a couple of times on my Scary Sharp set up, couldn't get used to it.
I've just free-handed my chisels and plane blades. Instead of the the main bevel and micro bevel, I wind up with a curve.
Sometimes the edge drifts off 90 degrees, but that's never been a problem.

If you're new to this and want to save money by not buying a honing guide....

Nick's got a nice double direction edge plane that fits in between the strips. Expensive though.

I made these two edge planes. One for each direction, fits in between strips.
Contradicting myself, they're a lot more hassle than a honing guide, but they're cheaper than $130.

I googled and googled and found an old Stanley 95? Hundred bucks. I found the nice edge plane Nick was using on one of his videos, $130.
So....based on the Stanley 30 degrees angle and 12 degrees (ever use a block plane at an angle? Ever use one straight on?)
Easy to make. Follow the link to my Flickr site to see more details and how I use them.

I made one for one direction, then tweaked the design--making it smaller for the second. They use 3/4" chisels--so these will be the most solid plane chisels in your shop.
They adjust with a tap. And the pivot determines how deep you bite into the strip. (The one on the left--red handle chisel, has a handle. It makes guiding more controllable, and it works as a tightening nut.

And because they're ugly, it'll be easy to make ones that look a lot nicer. There's more ugly pictures of them in use on my Flikr page.

Will