Shim it all the way forward. I put a bearing from the SCTE rack in behind the caster. Switch the screws, put the long screw through the back of the caster. I would add about 2-3mm of droop as it puts the axle at a different height. Check your ride height as well. Indoors it seemed to give more overall steering. I can't tell outdoors if it will be the way to go or not.