I don't think it's necessary, I just like to have the option to view it at x1 and find that the zoom feature here looks a bit like a rating option. That's why I point it out when I see pre-zoomed pieces since a few didn't notice that option.

Had the large version saved for use on other sites and I didn't think it was worth changing.  I can swap it if you think it's necessary.

you don't need to post a zoomed version of the piece, PJ has a feature to zoom in itself but none to zoom out of pre-zoomed pieces (the '+' and '-' buttons).