One of the first things that needs to be considered when beginning to think about Long Form One is why it is called Long Form One. First of all why Form One and why Long?
Why Form One? There already is a Form One - Short Form One. This form could have been named Form Two and Short Form One could have just been named Form One. This naming convention was set in place by SGM Parker because he wanted the practitioner to understand that any Short Form 'x' and any Long Form 'x' are directly related to one another. In other words, they are essentially the same form only with subtle differences and additions. Because of this naming convention of short and long plus the same name (i.e. Form One), the practitioner is always (and obviously) reminded that they are executing forms that are so related to one another that they are given the same name.
Why Short and Long? This part of the naming convention was set in place by SGM Parker because he wanted the practitioner to understand that the short form is fundamentally the shorter version of a long form. By doing this he helped reiterate the fact that the two forms are the same form, but highlighted the fact that the forms are different. And, eluded to the fact that the short form was the foundation form and the long form used that foundation to reiterate and expand upon the information presented in the short form. All with just changing one word from short to long.