Elite Models 8mm EPP Acrocub Instruction Manual page 11

Step11. Install the smaller hexagon shaped
plywood wheel collar and use the low temperature
hot glue to hold it in place.
(Make sure the wheel can move freely.)
Step12. Locate three pieces of triangle plywood as
shown.
Step13. Use thin CA to glue them together.
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11
Step14. Use foam glue to install the triangle
plywood block between the wheel collar and gear
leg.
Step15. Repeat previous steps to install the other
wheel.