Great example of form pulling for 18" forms.
While the construction sequence of a GST™ is different in a lot of ways from what installers have grown accustomed to, it is not so different that it can't be learned in a day.
Additional descriptions to come
A GST™ system is a stone and pipe system, sized the same as a stone and pipe trench. That being sidewall length and height, with the sidewall being the infiltrative area just like a stone and pipe trench. The only difference is that due to the shaped sidewall geometry the infiltrative area is substantially larger than a straight wall area found in a typical trench configuration.