1. Yes, I think you do
2. I don't think the US version ships to Japan? Not sure about the EU version.
3. Not sure on this one. I'm curious about the benefits of using the spreadshirt designer as well
4. PayPal works fine for me. No fees to receive and no fees to deposit in my account. You could contact them directly to see if they have other methods available.
5. Let spreadshirt do their thing since they handle the orders and reprints. It's good to put your contact information handy in case a customer does want to contact you about anything.
6. Nah. A very small minority of regular t-shirt customers is going to want to take the time to create it themselves (if they even have the ability). Part of what your selling on top of your unique designs is the convenience of not having to 'do-it-yourself'
