A printing method and system include a printhead configured to eject a fixer fluid. The outboard legs are especially configured and adapted so as to cause of wobbling of the device during movement so as to enhance contact of the outboard legs with irregular terrain for improved mobility and to allow the device to engage and climb elevated surfaces. The adhesive layer comprises a substantially solid adhesive composition that has increased adhesiveness to oral tissue when moistened with saliva or water. As a result, it is possible to assure a negative pressure in the brake booster at an early time and to reduce exhaust emission at a start of the engine simultaneously. The second pivot studs protrude away from each other.