Kenny-
There is this thread from 10 years ago that discusses a new, black Torker with a strong wheel. Buried in that thread is a discussion of making the seat post extension the way I described. I am attaching a photo of the finished product. I eventually gave that Torker, with the extension still on it and two bent cranks, to Steve Howard. He rebuilt it for his daughter. The insertion length of 3" is long compared to what you had to work with.
Edit: The seat post modification discussion begins on the second page of the thread.
