STEP 7
1. Slide pieces d4 and d5 together.
2. Fold piece d3 as shown.
3. Glue pieces d3, d4, d5, and d6 to piece d2 as shown.
NOTE:
piece d6 will be loose until Step 8.
STEP 8
1. Glue piece d1 to existing pieces as shown.
2. This creates an
elbow sub-assembly
.
3. Repeat steps 7-8 three more times for a total of four
elbow sub-assemblies
.