GOOD MORNING, Topping formations and slightly improved forecasts for next week shook the weaker corn bull out this week on a healthy dose of housecleaning activity.   Topping formation charts and scattered rainfall over the Midwest created long liquidation in grains, while beans found a bit of short-covering at the lows.  Beans, corn, and wheat are 35c off the highs posted Sunday night.  WEATHER Hot this week but scattered rainfall continues to play out across the Midwest with showers due in across the Midwest over the weekend.  Hot temperatures are due to break next week.  The 6 to 10 day outlook calls for variable temperatures and rainfall near to below normal.   STORIES Reports of slowing etha...