Do I need to use actual transparencies or can I get away with something else (like a sheet protector)? I have some sheet protectors and no transparencies and I seem to only find 100 page packages of transparencies for sale (which means they are pricey).

I understand now. I might use the sheet protectors (and sheet leave them clear) if I can't find some cheap transparencies, or maybe just not do the transparency thing and just go with cardstock.

In germany , at my local office supply shop they have a open box and you could buy, say 5 or 10 sheets. I dont remember the price exactly, but it was around 50 cent/sheet. I have 10 sheets, 2 I use for First light windows, two for the Manor and six I have not used the last year.