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Today I got back to work on the popup tipup modifications. I decided I was ready
to fabricate new popup arms, but wanted to ensur I didn't missdrill the aftmost holes
again. I decided that I needed to drill the pivot point in the U bracket first, then
after locating the arm in the correct position, transfer this hole through the U bracket
into the arm. Since this U-bracket is a critical part of the tipup weldment, I decided
to make a drill guide (on the left). I would drill the hole in this guide first, and
assuming the position was OK, I would transfer it to the actual U bracket. Worked well.
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