#1
Should submissions be monospaced, or adjusted to the proportional font spacing in the submission box? The thing is, I do my tabs in plain text files, monospaced in Courier font for readability. So, does it need to be reformatted for the submission box, or will sending it formatted as monospaced work?
#3
It should transfer well depending on the lengths of your lines. That's why it's sometimes best to just do it in the submissions box. I'd say try it and see what happens, without closing whatever tab you have open just in case. This is the best template to use:

e|-------------------------------------------------------------------------|
B|-------------------------------------------------------------------------|
G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
E|-------------------------------------------------------------------------|