No. 9 Oregon prepares for a big early season test in the Big Ten Conference on Thursday night when 22nd-ranked Illinois makes the trip to Eugene.And to hear guard Jackson Shelstad tell it, the Ducks (12-1, 1-1 Big Ten) have a considerable distance to go to reach their ceiling.”We feel like we haven’t put a full 40 minutes together all season,” he said Sunday after they blasted Weber State 89-49 to finish 11-0 in nonconference games. “We’ve been winning games but we haven’t played our best basketball all 40 minutes.”While Shelstad says there’s still another gear to Oregon, numbers suggest this version is pretty good, particularly on the defensive end. The Ducks are top 25 nationally in defending the 3-pointer and also boast top 100 steal and turnover rates, enabling them to convert defense into offense.On that end, the Ducks display balance. They had five double-figure scorers against Weber State, led by Shelstad’s 16 points, and enter this game with five players averaging double digits for the season. Center Nate Bittle leads the way at 13.2 points to go along with 8.5 rebounds.”I think that does help us,” said Oregon coach Dana Altman of the team’s balanced attack. “I think it’s great because defenses can take out one or two guys but if you’ve got five, six guys that can score … that makes a difference.”Shelstad chips in 10.8 points while Villanova transfer TJ Bamba adds 10.4. Stanford transfer Brandon Angel scores 10.3 and Keeshawn Barthelemy hits for a career-high 10. Three other players contribute between 6.5 and 9.3 points.While the Ducks spread out their scoring, the Fighting Illini (9-3, 1-1) call on their big guns for a little more production. Kasparas Jakucionis fires in 16.3 per game to lead four men in double figures, while 7-foot-1 center Tomislav Ivisic adds 14.7 on 54 percent shooting.