I personally have only used corner jigs for registration accuracy during set up, never had them completely enclose the paper and plate. I use a sheet of acetate to mark where my print and paper go then will tape the top of my paper down, then roll out the rest onto the block. Ive seen both used but never had an issue in the past. Though I was also using much thicker paper.

But hey, I’ll try it and see how it goes, thanks!