received my upgrade 215+ for my 101 yesterday.

it comes with a prepaid shipping label, just toss the 101 in it and mail it back. there is no deposit or anything, they just trust you to mail back the 101. my 101 was modded too as i had thermal epoxied an additional heatsink the the voltage regulator. they said that was fine.

so, my cost to upgrade a single 101 to a 215+, shipped to the USA, was $55. $35 for the upgrade, $20 for shipping, and that $20 covers shipping both ways.

i gather those in other countries have far higher shipping costs and are not happy. there are ideas being floated about setting up central points in some countries to ship the acorns back to for cheaper. dunno how thats panning out though.

also, the acorn warranty does not start till the miner comes out. so, looks forever warranties right now.