The rack attachment tabs are Alex Wetmore's waterjet-cut jobbies, a huge time-saver over
making them all myself. As you can see in the photos, I stack up 5 tabs in the vise, and
drill down @ 5/16" to 'mill' the center one of the 5 to receive the rack strut tubes. Then
I remove the center tab and put the next one in (pre-slotted close to the final shape), and
repeat the process two more times, to mill the three tabs this rack needs. The outer four
tabs are sorta "sacrificial" and are just there so the drill doesn't wander, catch or tear the
tab.   (I can still use those four tabs on some future project though, they aren't ruined.)

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