Stabilising raised logs/sticks?

[CaramelBeet]

Hi all,
My little guy is growing quite quickly now, and I'm starting to worry that the logs in his enclosure might not be stable enough now that he is getting big. I was wondering if anyone had ideas for securing them? I was thinking of screwing a large base onto the big log, but I'm a bit reluctant because then it's hard to take out and also hard to put in the oven to disinfect. I have a wooden viv with a glass front, and if I can avoid it I'd rather not do anything permanent to the viv (like putting screws in or something). Any ideas? It looks like this:

 

[charmander16]

That stick is really not wide enough.

Although it would be permanent I recommend putting in a shelf. You can do it as a corner shelf or a shelf along the back wall.

Another option that is not permanent is basically a table, which is just a shelf on it's own legs.