Anabolic = body in growth mode
Catabolic = body using muscle for fuel

Stu, ditto the honeymoon comment. Just go with the flow. Unfortunately thing will inevitably slow and I'll make a mental note to pull this post up in 6 months when you are complaining of slow gains It hits us all

However, if you are managing the full stack on the weights then you may have to get inventive (use a second pin to hold on a disc weight) OR find another gym with heavier weights!

And nice one on adding Squats, how is the back afterwards?