I have an older Stihl 025 and recently ordered an air filter but what came was the top of the newer style filter. I can buy a whole new style filter with housing but it is thicker at the top than the original and I'm concerned that it will not fit behind the cover. has anyone replaced an older filter with anew one? PIx are of the original one piece housing and filter next to the replacement element only, and the original filter in place. Thanks, Larry