High points: Adjustable “snuggers” in the edges of the insert help it fit snugly in the table opening. Plate-leveling adjustments are made from above the table.
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Low points: You can’t change bits from above the table without a collet extender or offset wrenches. Mounting a router may involve partial disassembly, so you’ll want to dedicate a router to this lift.
More points: 32-tpi thread pitch makes bit height adjustments slow, but precise.