well, i think it is safe to say the petshop i bought him from hasnt got a clue as to how old he actually was when i bought him.
he has grown loads since i was informed about his MBD he is now 3.5 inches from front to back and he is about the same around aswell
he is also a lot more active now he is having the multivitamins and also now he has the light to give him the day/night cycle ... i recon it wasnt light enough in my living room for him to get the correct cycle