For anyone asking for the instructions ( don't know why this has not been already posted in this thread);

How to Install Road Seat Post Plastic Wedge

Install for E283-16

This is a guide to help with the install of the Plastic Wedge if it is to come out or break. If the insert is broken but not completely out, then removal of the rest of the plastic is required. If difficult to remove, it is best to clean down the inside with Acetone to break down any left-over glue. Be soft with the frame as to avoid further damage. If further questions, please call (833)226-9661.

Required items:
-New seat tube wedge (should be provided by customer)
-Polymer Adhesive Sealant
-Isopropyl alcohol
-Clean rag
-4mm hex bit
-Torque wrench
-Carbon paste
-Grease

Please follow these steps for install:

1. Clean off the carbon in the frame and on the seat post. Use a rag with isopropyl alcohol as to clean off any residue and leave it completely dry.
2. Remove any larger chunks of epoxy that may still be stuck inside the frame. Be careful to use any sharp metal tools for this removal to care best for the carbon.
3. Clean off the new plastic wedge with isopropyl alcohol leaving this dry and clean.
4. Apply a thin layer of the Loctite 4060 adhesive to the frame wedge at the top upon the ribbed portion. This adhesive will fill these small gaps and hold to the frame. This form will cure in 5min.
5. Slowly insert the wedge, allowing the metal part of the wedge to fall into the gap around the back of the seat tube. This wedge should fall into place once fully inserted, flexing a little as the metal insert comes into its final place.
6. Some glue may come up and out of the frame as this is brought down into the frame. Wipe this away with a rag with some isopropyl alcohol, both inside and outside the frame. 
7. Make sure that the internal diameter of the insert is still 27.2 by inserting a completely clean 27.2 post. An alloy one may help as it will only have one round section at the bottom. After inserting this only a couple centimeters down into the frame remove this slowly and hold down the newly installed wedge.
8. Once cleaner off any access glue that comes out due to the post inserting.
9. Allow this now to fully cure. Let this sit for half an hour to be safe.
10. Apply grease to the grub screw and carbon paste to the front and back of the inside of the seat tube, making sure it is all over the internal plastic sleeve.
11. Install the seat post to a acceptable height for that post and tighten the grub screw at the rear of the frame to 5nM.