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Date: Fri, 17 Oct 2008 21:03:33 -0400
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From: Bill Hogarty <billhogarty@hughes.net>
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Subject: L-IV Gearbox
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Ralf:

A lot of folks have replaced  the nylon tubing in the gear legs with 
aluminum tubing to avoid the obvious problems associated with nylon and 
high heat.  Much has been written on this problem and you may want to 
check the archives for  background.  As I recall, a special tool is 
required.  Someone made up the tool and it was passed around from 
builder to builder.  You may have to ask on the LML to locate it.

The bolts holding the rear spar to the gearbox have to be checked each 
annual.  To make the process a little easier, I cut out a small square  
in each spar cover and added a removable cover with gasket.  
Unfortunately, the original spar covers were not perfectly flat and, at 
the time, I didnt think to build up a perfectly flat surface for my 
gasket, SOooo, I ended up with  small  pressure leaks that took a lot of 
silicone to seal.    BUMMER       

Good luck with your building.  Bill Hogarty