Without having the serial prefix on the D10 , I believe that model had a detent ball and spring on the equalizer bar. . I liked the premiere this year better than the last years , they are gold mining right off the bat , Parker got gold as well as the Dodge boys. That along with the equipment keeps me interested in the show. Tony's cursing gets a little old , I have fired the F word myself but not about everything there is to f about. He probably can't even pour milk on his cheerios without firing an f bomb. Or is it his character.