they may have added more elastic type mounting foam. they know we as consumers pretty much dont do preventive maintenance like we should.
the biggest cause for a/c unit vibs is a dirty or out of balance primary fan (squirrel cage) the vanes pick up dirt really fast and will set up a buzz, hum, vib pretty quick.
dont know how many hrs are on your unit....but if its been running for a month...i bet the vanes are dirty.
might try a good cleaning before you waste time and money chasing a kit
USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, no your eyes are fine, there are 6 slides