Sick explanation about position-GustavoDantas(vid)

I love the detail in this

http://jitsmagazine.com/video/maintaining-your-position-gustavo-dantas-part-1

for later

Nice video.

. Phone Post

Sub Phone Post

Nice video. I have started playing that position but I have problems when my opponent kinda backs out and stands. What are some suggestions would you have? i guess I just have to be quick and transition to an open guard-De La Riva, Spider, etc.