John Guest USA added three manufacturers rep agencies to represent its Speedfit line - Dave Grannell & Associates (Denver) in Colorado and Wyoming; Nov-Ell Sales Corp. (Hawthorne, NJ) in New York and New Jersey; and Foster Sales Co. (Las Cruces, NM) in New Mexico and El Paso, TX. Woolf-Harris (Mandeville, LA), will represent Tennessee in the retail hardware trade.