i just bought a craftsman 4 cycle trimmer about a month ago. i've changed the oil twice and it's kind of a pain in the butt. they give you a thumb screw to remove and you tip the unit and dump the oil out. well, the problem i have is there's a plastic cover surrounding the oil drain/fill plug and there is a 1/16 inch gap between the crank case and the cover. you end up dumping oil between the cover and the crank case. you can either leave it there to slowly drip, or you can remove about 5 screws and remove the cover then drain the oil. i've tried sticking the business end of a funnel in the drain/fill hole but none of my funnels will work. i'm thinking about going to the hardware store and buying a sort piece of galvanised pipe threaded on either end and a cap. threading the cap on one end and screwing the other end in the drain/fill hole. the only problem i see with that is i'm sure the crank case is aluminum and i'm not sure i want any length of pipe threaded into an aluminum hole. one bump and it would rip the threads right out destroying the crank case. does anyone have any suggestions?