Do i have the #30-090

A handy person from Massachusetts says:
August 18, 2014
It appears that your part # 30-090 is what I am looking for except that it states in the discription that the arm length is 5" long and the one I have is approx 4.4" long.

Is there another crank I should be looking at?

Thanks, Rich
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Tom from SWISCO responded:
August 19, 2014
This actually looks more like our 39-188 and 39-187. I know it's hard to tell the difference, but the key part is the gear arm. If you look closely, you can see the 39-089 and 39-090 have a sort of "Z" shaped gear arm, while the 39-188 and 39-187 have more of a "W" shaped gear arm.

Neither have a 4.4" long link arm, though. Can you confirm that measurement? If so, you may have to adjust the placement of the bracket in order for them to work.
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