Amazing progress so far! Indeed what usually holds me back from buying Character Customization systems is the modular clothing for the characters. If making clothing is as easy as you say, then this is a day one buy from me :). Also, selling clothing packs for your system is a great idea. I think making “themes” would be very popular (Sci Fi, Medieval, Modern, etc).
If you can, please make a quick video showing what you have so far 