i took apart my first ac tank i didnt know there was a motor in there and i gave away so many ugh all that money down the drain=( not sure how many pounds of copper is in the motor. funny thing it took me for ever i used a hacksaw went all around the weld line like it said on the internet. getting the top of the tank off was not easy even after going around it. pulled out the motor was suprised to see how big it was. has anyone cut one from a window ac? mine was from a central ac just hope its not a ali one. i think it was a 35lb tank not sure it was heavy and i had trouble lifting it lol. so what is the weight range on the motors for the copper? i assume there are many sizes of tanks.