Absolutely, and no trouble at all! We still have late backing options open for the physical books as well, and you should definitely be good through April.
Heya again! Just backed the project, but I think I didn't send the right amount... Just saw that there's a difference between the Rewards section in the middle of the page and the Available Rewards on the right of the page, I didn't realise it was changed to $85 from the original $80. Is there a way I can add to my pledge, like through PayPal or something? I'm the backer Kelly Herz on Kickstarter.