By Lori EhdeThe Rock County Free Fair officially starts today, and Fair Board Secretary Lyle Nelson said organizers are ready."We haven’t had any glitches whatsoever," Nelson said Tuesday. "That doesn’t mean we won’t run into any during the fair, but it looks like everything is going really good."He said booths in the commercial building are all spoken for, and the grounds are ready for crowds.Because of increasing popularity in horses, the swine building will accommodate seven stalls for horses that overflowed the 24-stall existing horse building.He said history will steal the show as far as new highlights to the fair this year.For example, a thrashing show from noon to 4 p.m. Saturday on the north end of the fairgrounds, will feature a corn shredder, corn sheller, stationary baler and a thrashing machine that will thrash two racks of oats.An antique tractor show from 10 to 4 on Saturday will go on next to the history barn, which Nelson said has acquired new donations this year."There are lots of new pieces of Rock County history out there," Nelson said.He said the fair promises a solid lineup of entertainment this year.For example, Thursday night’s Rock County Talent Show has 31 entries. "So that’ll be really great," Nelson said, of the third annual event.The Nobles/Rock Cattlemen’s Association will sponsor the annual Beef Feed at 5:30 p.m. Thursday.The popular Christian a cappella group, Go Fish is lined up for the grandstand Friday. "We’re expecting a big crowd for that," Nelson said.Also on Friday, Carol Zwaan and Country Grass will provide free entertainment for Senior Citizens Day at 2, 5 and 7 p.m., and the Rock County Pork Producers will start the pork feed at 5 p.m.Midwest Rides will provide the midway for the three days.