does anyone have a good strategy for keeping paper and neg in registration for POP processes under a vacuum frame?..i have a nuarc vacuum frame that i use with my UV box on top of that..i've been doing VDB, kallitype and albumen and am wondering the best way to be able to inspect print-out during exposure without messing up my registration when i open up the vacuum frame...is some kind of tape the way to go?

regards
-andrew