glue them on with bob smiths and use activator or be patient, try not to clear the double double at first until you find a fast line as i found you can lose alot of time, get familiar with the track first, the small double doubles cant be cleared as one unless you can get a good run up and a fast motor, the 4wd with the 7.5 couldnt do it, also keep a eye on tyre wear, on a 4 wheel drive a full set i could just get a day before they started to lose grip significantly. but most of all, have fun
