We need a masterclass thread on how to edit the firmware!!
It's super easy.
You can download the tools to pack and unpack the firmware here:
http://www.mediafire.com/download/h8nq8n3pbcx5qbi/X1+firmware+tools.zip
Just put the x1.fw file into the X1 firmware tools folder (along with the pack.bat, pack.sh, etc. files), double-click on unpack.bat and an x1 folder should appear. So that's the firmware all unpacked. Go into that folder, then the litegui folder and then the theme1 folder (if that's the theme you want to edit). To change the font size, you'll have to open the config.ini file in the theme folder. Go through the list and look for anything referring to size and that should change the font for whatever it is.
For example, the first one you'll see in the list is:
<topbar_volume_size>12</topbar_volume_size>
This is referring to the volume number at the top left of the screen, next to the speaker icon. Change the number 12 to whatever size you like.
You can go about changing the colors as well.
<topbar_volume_color>0xFFFFFF</topbar_volume_color>
FFFFFF is the code for white, 000000 is the code for black (so this one would be 0x000000)
You can find the codes for colors here: http://www.w3schools.com/tags/ref_colorpicker.asp, then just put the 6-character code in place of the FFFFFF.
And if you're feeling really adventurous, you can go into the other folders and start changing the images.