I have the TRMR roof rack on my 2dr Badlands. I can still take out the 2 front panels. Right now I have a RTT - ikamper 3.0 mini, and a 95L ROAM box on top.
Your title is misleading. I thought you meant the rear window in the hardtop, but the rear door windows. The hardtop glass is the same. The doors are a different size. The 2dr doors/ windows are longer than the 4dr doors/ windows.
Find another shop. Mine were easy peasy. I think they disconnected the battery so the windows wouldn't lower. I paid $200 for mine - I have a 2dr. San Diego
My original order was a Black Diamond = washout interior, rear locker, black steelies, aux switches. Then, while my order was pushed from '21 to '22, I attended Off-Rodeo. While there I drove a Wildtrack. That experience convinced me to 'get the tech'. But, instead of getting bigger tires...
If you precook some of your food and put other fresh items in the fridge you don't need s freezer. If you have kids (ice cream/pops) or need ice for drinks... then you're stuck. I'd stay with the fridge. Good enough for Overlanding IMHO