I just purchased a 1946 Featherweight 221 yesterday. She looks pretty well taken care of, her motor is fairly quiet, and her stitch is perfect. Last night, I opened her up, cleaned out some of the gunk (including a fuzzball to end all compacted fuzzballs under the throatplate), oiled her and put her back together. My only problem is that her top speed is granny gear. Is there a way to increase her speed?