Thanks all for the info so far.

In the thread link that Craig posted, DR recommends the ACR SARLink which costs slightly more then the McMurdo. The extra cost is not a problem if the ACR is better investment overall then the Mcmurdo.

I'll do some research on the ACR over the next couple of days.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock