Saving slot for base design ( idea )

Hi, you guys know right that people use farming, defense and etc. Base design.
When you guys try to chage to a new design but don't want to erase your previous design,
This feature comes, so you can save your previous design without have to make it again, if you want to
Go back to your previous design, just save your previous design and put it on the slot and save it,
And make another design as you like, maybe your design is in farming mode and you want to go back to
Defense mode just click your slot and done, but don't forget to save your new previous base. That's all from me
Hope you guys like it sorry for bad language.

i agree with this just like the features in happy fish where in you can save different fishes that you caj switch into quickly