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Here's my version of a lift arm for the DeWalt DW788. I know, how many ways are there to skin a cat. I wanted something very simple to build and use. This design features a tapered catch that slides under the existing plastic housing by the speed control. The arm (1/8" x 1" aluminum) is positioned so that the latch pin normally sets about 3/8" away from the black plastic housing. The arm can be raised or lowered without interference. With the arm fully raised the latch pin clears the housing just enough to allow it to be pushed left to contact the yellow arm. To latch the arm in the up position simply raise the arm with an up-turned right hand and use the thumb to push the lift arm to the left. Allow the arm to come down and trap the latch pin under the housing. To lower the arm simply lift it up and the latch pin pops away from the housing allowing the arm to drop. The latch pin is a 1/4" x 20 flat head phillips screw. I'm sure it could have been used as is but I decided to turn a shoulder at the base of the head. This eliminates wedging the housing between the screw head and the nut. The mounting holes in the lift need to be positioned accurately to keep the arm as high as possible but still allow the latch pin to clear the housing. The arm only droops about 1/8" when held up by the lift.
