i got some new forks for my grimace bike yesterday, the headtube length is right, and everything fits (well, kinda) but my problem is that theres about 1/2 and inch of extra thread. so how can i cut the forks in the threaded section? im thinking of putting aheadtube nut on, and then using a sawzall to cut it as straight as possible. anyone before i totaly ruin it doing it wrong?