Hello, I pledged at the $60 tier at the Kickstarter and am considering giving more money when I have some more available. I was wondering if I can pay the difference between what I have already pledged and the higher tier amount? I totally understand if that cannot be done, but I figured that I would ask all the same as I love what you guys are doing and want to help you out as much as possible (plus, that boxed edition looks quite sexy I must say ;-) ). Please let me know either way. Thanks in advance for your time and understanding.