Your sticker is now complete. What comes next is a beauty pass and error checking.
Some of your curves are still a bit edgy. Those should have been corrected in LDPC but then you would not learn how to move vertices in LDPE.
* Make sure you are in top view - in the 3D Editor
* Make sure Move Adjacent Data (B) is on - in the 3D Editor
* Click Move the Manipulator to Origin - in the 3D Editor
* Click Orient the Manipulator to World - in the 3D Editor
* Select Fine for the Snapping Grid - in the 3D Editor
* Select Vertex Mode (F2) - in the 3D Editor
* Click the Select (1) icon - in the 3D Editor
* Select the vertex you wanna manipulate
* The Data vertex: dialog pops up showing the values of the vertex
* Click the Move (2) icon - in the 3D Editor
* Click Move the Manipulator to the Nearest Vertex - in the 3D Editor
Your manipulator will jump to the selected vertex.
* Hovering over the arrows of the manilpulator they will change color to yellow. In this very moment you can move the mouse to left/right or up/down based on the axes you are working on to move your vertex
* Keep an eye on the Data vertex: dialog. If after the manipulation Y is something rather than -0.25 something went wrong with the plane you working on.
I hope you realized how convenient is is to do all the tweaking right in LDPC.
Smooth out all other edgy vertices. For example:
13.7186 -.25 4.363667
-13.9074 -.25 1.922167
-15.9594 -.25 -9.325833
-10.5729 -.25 10.84267
Screenshot
LEGO ergo sum