My galley wall was my guide to square the build. I put it in immediatly after 1st wall was stood. This was the only way I could guarantee both walls would be 90 degrees to the floor and parallel with each other.
Rear was solid the minute both walls were installed without spars. I installed a couple spars and the front had a wiggle so I framed the nose cabinet next to reinforce the front. Then after making sure my front and rear measurements were the same I cut and installed the missing spars 12" on center.
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If you look close in this pic you will see 2 cross spars that are not rabbeted into the sides these were installed simply to stiffen and square the front so the spars could be installed square and even. The panel you see became the back wall of a nose storage cabinet. It is a bit shallower at the top than the bottom but has served us very well.
