vacuum ring for vacuum bag (automatic Alignment)

I find out most time we not just take one and put in to vacuum, before vacuum we need put it in right place that is so Annoying
So I made this ring!
it automatic align the Corner valve no need to move it around anymore!!!
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Find out people have some problem with the size of the ring that does not fit well….. the main problem is even the bag is same size witch is 30x34 in the title page, the valve was not all in the same place and I did not find a way to fix this (least at now)

Boost MeIf it useful to you~
and thank you for print it~