Was looking for one of these so I could track my tank collection, but I couldn't find one, so I decided to make one myself. REV 1 is still a WIP, as I only have 3 trees complete, but I should hopefully have it full in the next few hours. If you want to use it, just save a copy to your own GDrive, and you can start tracking your collection!
I decided to do premium and normal tree tanks in different sheets, with the premiums tracking as owned/unowned, and the tree tanks showing as researched/not researched, as I don't keep most tanks once I research past them unless I really enjoy the tank. If you have any suggestions, let me know!