Lol, I know the feeling. I was trying to solder part of a mod right before christmas, and it was about 20 degrees F in the workshop. My hands were shaking so bad I couldn't get a good bead going at all.
Take your time, bro. I'm sure you'll have good stuff to show us once it warms a bit, and this will give you more time to plan and collect the bits you'll need for the mod.