I either make space by adjusting the shelf height, as I have for CW Devastator and POTP Predaking, or I place them on the top of bookcases as I have with Gen Metroplex, TR Fort Max and TR Trypticon. And I've already allocated a top shelf space for Siege Omega Supreme; also my G1 Fortress Maximi and Brave Maximus are on top shelves.

If you click on the link to my collection pics in my signature you can see how I used to have them. My Brave Max hasn't moved; my G1 Fort Maxes have been moved to the top of a different bookcase. My CHUG Devastator and Predaking are on a different shelf but height adjusted in the same way, and Trypticon has been moved to another shelf top albeit in battle station mode as it's the most compact.

I'm someone who refuses to have my toys in storage (cos it makes it a hassle to locate individual toys to play with) so I need to find new ways to economise space. But this is also why I regretfully skipped LG Grand Maximus. As much as I was super tempted to get it as really probably the only way I'd ever own a Grand Max, I just couldn't justify getting a space-wasting repaint of Fort Max. And if they ever did a CHUG Metro Titan, in all honesty I'd probably skip it too for similar reasons. It's not even a money thing; in all honesty I could afford these toys. I just don't have the space for them. When news of Siege Omega Supreme came out the first thing I did was sell off my Year of the Snake Omega Supreme which had been my CHUG Omega Supreme. Many of the toys in my sales thread are really there to free up space.