A Makio is the same thing as a soul but with the front foot up and perhaps grabbed. Being able to do soul grinds is of great assistance when trying to learn this trick because being able to lock in the soul foot is a skill that takes a bit of practice to acquire. In any case, you approach the rail just like you are going to do a soul grind. Make sure you jump up high and get your weight on top of the rail. Lock in the soul foot and away you go. The free foot can be doing any number of things, such as grabbed with the same hand (Ie - Left hand grabbing left foot), or have it laying across the soul foot that is grinding. If you decide to lay one foot on the other it's called a Christ Soul.