had a question on age of a bagger

[snapper]

Recently bought a gcex used and realized it must be an older model. It is the 4.15 model, and only gave about a 100 less than my dealer price new. So not sure if the deal was as good as i thought at the time or not. But i realized mine doesn't have the tab for the extender latch. So how old does that make this unit? And have there been any significant changes since mine? Was just wondering. I like this thing so much i might have to sell it this fall and buy the bigger one. I am using it more than i ever thought. Thanks!! chris