Thanks for the tip Avalanche.

I talked to Garmin today. Turns out... all of the 110, 120 and 130 units are capable of accepting the upgrade. However, Garmin is only offering the upgrade to owners of untis with the 5.0 or greater software.

I am currently working my way 'up the flagpole' at Garmin in search of a wavier to this policy. If I am successful in obtaining, I will post the info.

Never hurts to ask.