Hey! "Mom" 
Your guy is doing great - 122g! He does give me the hairy eyeball when I put him in his bath and then forget about him (I really have to stop doing that!
I have made some adjustments - see my post above re: the lights in the tank. As for the rocks...believe me, he ain't toppling those! That one on top is VERY heavy. It has to be 30lbs. I am sure I will need to raise it up though as he gets bigger so will take your advice and secure it if I can't find solid "pillars" to hold it up.
The tank has a lip on it, so even if he jumped there isn't anything for him to grasp onto. Would he be able to hold onto the sides? :-/ I didn't have the UVB strip up when I took the pics so that will block him along the back anyway. I had posted here about a lid for such a big tank and was going to make one, but one person said his bd is in a 75 gal for 2 years with no lid. I am going to make a half lid/screen to set lights on as he gets bigger (in above reply). Oh, also, the light to the left is sitting on the rim now with a 75w bulb. I only had a 60w in it before and had to buy more 75w
Today was really hot and decided to put a lower watt bulb in the second spot bulb. I amd SO glad I have my temp gun! I would never be able to get the temps right in this big tank w/o it.
Btw, I took the digital temp gauge form Luna's cage today (first thing i have removed since she left - it was very weird
...anyway, where is the best place to put it? Thsi tank is so big and I know what his basking temps are. For now I just put it over near the plant, but frankly he ignores that side of his home.
thanks for the tips!
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Chameleon Help & Resource Info
0.1 Veiled Chameleon - Luna
1.0 Beardie - Darwin
0.2 felines - Kyndra and Lita
0.1 African Clawed Frog - Skipper
0.3 Mad. Hissers (2 died ;(
0.1 Chilean Rose Hair Tarantula - Rosa Leigh
0.1 Goliath Bird-Eater Tarantula - Natasha