After 11 years, 14 albums and a like number of personnel changes, Poco has finally zeroed in on the charts this summer. With the release of their "Legend" album, the country-rockers have fired a few successive singles into the Top Forty. For founding member Rusty Young, it's been a long time coming.

Young and veteran Paul Cotton were the only familiar faces on stage Saturday night for Poco's concert at Merriweather Post Pavilion. Together with three new band members, Young and Cotton divided their time between selections from "Legend" and such sentimental favorites as "Good Feeling to Know" and "Indian Summer."

While Poco has noticeably shifted its accent from country to rock recently, much of the group's versatility is evident in Young's immaculate playing.On pedal steel alone, he brought to "Rose of Cimarron" both the sweet and drooping sounds of Hawaiian guitars and teh harsh metal-on-metal dissonance of a Delta slide.

His boyish tenor blended nicely with Cotton's husky vocals and striking solo work on lead guitar. Later, on the first of two encores. Young delighted the rain-soaked crowd with a flat-out bluegrass breakdown on five-string banjo.

It's not the kind of music that will ever make the Top Forty, but it certainly has made a lot of friends for Poco along the way.