Swing puzzle with Rollers

First print rollers (2 pieces). They should be little bit heavier, so I printed them with 100% infill.

Then prepare print of the body. When slicing insert the pause command at height about 10-12mm to place rollers inside the body (right-click on the layers “scrollbar” and select “Add pause print (M601)” choice).
 

No supports are needed to print. Inside of the swing is full of printed bridges. Check the inner of the swing is as smooth as possible (without edges etc.) 

To solve the puzzle you have to put rollers to places on the opposite sides of the swing. You cannot touch the rollers or squeeze sidewalls.

Happy printing ;)