(1) Panel has five spaces left.
(2) My power needs in the shop are very simple. Two 110v circuits are all I need at this time. One would run a shop vac, which would be running when I operate my contractor's table saw, my small jointer/planer, my small bandsaw, etc (all of which have 2.5" ports).
(3) I'd sorta like to save four panel spaces (two on each side) after using the tandem. I'd use these four for two future 220-volt circuits (possible tool upgrades).
(4) Read "On the Internet" that tandems heat and false trip more often.
Should I use the tandem (I have already purchased but can return), or should I get two 15-amp breakers and switch to the tandem when I go with the larger tools?
The heating/false tripping thing is a concern. If it is true, I'd use two breakers. If it is Internet nonsense, I'd prefer to use the tandem.