To align and glue fit a 9.5mm Cue tip. Lugs go towards to bottom. The hole is tapered to fit the cue allowing for 1 layer of masking tape to protect the cue from glue. Put the tip in the top. Mask up the cue and apply gel super glue to the top of the cue. Insert cue from the bottom and the cue tip will be perfectly aligned with the cue. Pull the tool down the cue (holding the tip in place) and leave it there until the tip sets. Then remove the tool from the side. The bottom first layer is solid to prevent the middle being filled with filament if using a brim (which is nightmare to remove) When printed, cut through this single layer with a stanley knife so that the whole side slot opens up.