I am not sending you any suggestions except to say that what you wish to 
do can be done but it will be very involved and you will need to crawl in the 
get it to work.  I had a Lehman working some years ago and know what a time 
it is to have it stay in neutral.  I wonder if I should have make a vertical 
one and have plans in an old Scientific American. The problem is that it 
needs springs that best would be make by a machine shop. They are not coil 
springs but flat pieces of metal.

Ken from Gardena, CA
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