Excuse this blatant plug for an instrument I manufacture.
Have a look at the FlarmNav. It will allow you to download your flight
log to a USB mem-stick from your Model 20 in-situ.
It also provides some basic nav functions and allows loading of a
turnpoint database. Soon we will be offering a wind vector function as
well.
http://www.rf-developments.com/shop/...d&productId=10

With the current exchange rate between Australia and USA it's a
steal!!

Cheers
Mark