I remember my early days of playing rubber guard. My game wasn't very polished at the time, but not many people played rubber guard back then. This allowed me to have more success with it early on. Today it is well known and the traps and such are better defended in general. Continue to work on your rubber guard game. However, I would stress focusing on your half guard game first. Eddie lays it out first in his book for a reason. Most people will give you half guard b4 giving you full guard. Also, you will find a lot of times you can transition from half to full guard with your partner already broken down. This will allow you to start you rubber guard game a step a head. Its not going to be easy. You will need to rep and roll often, but if you focus on your half as much as your full guard, it will be hard to shut you down early on.