Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: GM 3.4L Timing Tools

Just as the previous review stated, I also had to adjust my cam sprocket holder (J38614 - the 3/8" square drive tool with three lugs). The lugs were not 90 degrees to the base, requiring the inside surface of each to be filed to fit between gear spokes. After modifying, the tool worked great on my 95 cutlass supreme 3.4L