Logo customize option is working now.
So, we can close this thread.
Of course not. This is only beginning and may be there can be done something more useful.
But be careful with next steps and think about motto there:
"We don't like to break it - we like to make it better!"
and test your idea before and have repair or undo procedures
ready so you don't have many angry "brick" owners here.
Always is good idea to remove non working files from here too. Or what you think?