I’d start with 3 and add more later. 3 is the absolute minimum I’d use here. Everything should be a user widget. I never use buttons, I wrap them in user widgets, too. I don’t user borders, I make my own user widget borders. (not always-always 
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This way I can take a button and have it look at work the same everywhere else. And I want to change how the buttons looks, I do it once rather than 192 times in 14 different menus.