Afternoon, mate! Yes, you can.
I made all the pieces in a way you can re-create the same characters you find on the kits and vice-versa - the kits don’t have characters that can’t be built using the workshops. The sample characters on both the workshops already includes the characters present on the Battle Kit I ready for use.
The Printer just makes your life easier in a way that building up a character is a few clicks away instead of having to place everything by hand. The Workshops, however, gives you more freedom since you can use as many pieces as you want, mix and match layers and so on.
Hope that answers your question, feel free to ask away and drop any suggestions. Thank you for dropping by! :)