Locking Plant Vase

This is one of my first full models and prints so apologies for a bit of imperfections. I'm still learning. This was driven from a relative that was going to go buy a vase to put on a gravestone for his wife. They had a specific flat area made for holding a plant and he was going to just go buy a pot. But I wanted to do something special and more functional. This vase has a locking bottom water capture plate. The plate can be stuck down to the stone but still allows the pot to be twisted off and removed for replanting and cleaning etc or color change etc. This way the maintenance workers won't knock it over nor will it blow over in any weather etc. But also I wanted to put a personalized sign on it one that could be interchanged etc(plaque is w110mm x h40mm). So I needed a flat spot. All the other public models and some I even purchased didn't fit all the criteria so I whipped up one of my own. I'm attaching everything including the fusion360 files. So feel free to take what I've done