Can't tell you why, just that it does. The brochure said 128 (with trap-ox), I wanted to see what mine did, ... did just fine.

The 300E M103 is supposed to be good for 140. With 3.07 gears (vs the OM603 or M104 with 2.65:1), does make the M103 spin a little more for the speed though.

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Gone to the dark side

- Jeff