A select spring coupler structure is outfitted upon a flat finisher assembly or apparatus so as to enhance the user's ability to maintain the flat finisher apparatus. The flat finisher apparatus essentially comprises at least one (tension) coil spring removably held in tension between opposing anchor structures. The select spring coupler structure according to the present invention is outfittable upon the coil spring at the first spring end of the coil spring. The spring coupler structure comprises certain radially extending structure for engaging the first spring end and certain finger engaging structure for enabling manual alteration (i.e. via one's digits) of spring tension so as to disengage the first spring end from respective anchoring structure. The spring coupler structure may be twisted into engagement with the first spring end(s) via the helical structure of adjacent loops of the coil spring to couple therewith.