Step 3: Top part
1. Cut out of a thicker block an about 3*2*6 in block
2. Use the wooden thing I made to cut at 10° to make a hole at about 5 in from the bottom part hole shoul be 3/8 in.
3. Make the same block again.
4. Glue/Nail the first Block at the front of your platform.
5. Use a 3/8 Rod and stick it through your first hole.
6. Put the other block on the other side of the circle and mark the point, where the rod hits the block.
7. Drill a hole at 10° about 1/2 in deep.