As a private user it worth it/ possible to upgrade from Gold to Business class for the advanced checklist feature? I am a PhD student using trello as a private Gold user since a couple of years, but would find it really useful to assign due dates for individual checklist items (each card on my to-do board represents a PhD chapter with the checklists covering the different sections). I understand the business class is really meant for teams - but what's your view on whether its worth it to upgrade? Any other fellow gold users / Phd students with views on this?