ok ive got my gs-15r aparat and i removed the bearings now the front bearing has dual shields (one on each side of the ball race) and ive been thinking should i remove one shield as to let oil and lubricants in?? id remove th inned facing side so ast to still have a shield on the outer(flywheel) side so as to keep crank case preasure and oil in the motor opinion??? is this a good idea or not??? thanks all