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Sump build measurements need help

nightmarepl

NJRC Member
Looking to build my own sump got some plexiglass
Making sure my measurements are correct

1/4 thickness
48x18 front
48x18 back
48x20 bottom
17 3/4 x 20 left wall
17 3/4 x 20 right wall

The left and right side walls will go on the inside over the bottom portion
I’ll also be adding a euro brace
Do these looks right?
 
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