Warehoused Images and Page Size

I have a page of 8 warehoused images (about 600kb), using Yuzoolthemes “Warehouse” Stack.
I now want to use the S4S “PrintBox” stack to set up a printable version of the page, using thumbnail size versions of each image on the web wage. I’ll be setting PrintBox to not display its contents on the web page.
In terms of minimising page size and load time, should I create separate warehoused thumbnails to use in PrintBox, or is it OK to copy the web page Warehouse Stack into PrintBox and then scale the image to suit the PrintBox page?
As always, comments are very welcome.
Thanks