Happy birthday to you and congratulations on scoring Primus I love how compact he is in planet mode. Do you have a Unicron to fight with?
First of all, congrats on the Primus, he is indeed an awesome toy. Err...Not to sound imposing here, but is your pic? 'Cause, I think it is from tformers.com review of Primus done by Micheal Henry. Unless you are Micheal henry, then I sincerely apologize.
Primus is a good toy, but I feel the need for the Omega Lock for transformation kinda takes away from the overall feel. I only bought mine because I didn't have one yet and it was $30 at Walmart. I don't regret it, but I feel there's better things I could have spent my $30 on.