On Sat, 02 Apr 2005 08:49:04 -0500, Bill Putney >
wrote:

>maxpower wrote:
>>
>> It makes a big difference where and how to store these drums/disk on the
>> shelf, they can warp in the box beleive it or not
>
>Please explain.
>
>Bill Putney
>(To reply by e-mail, replace the last letter of the alphabet in my
>adddress with the letter 'x')

Drums are to be stored flat, not on edge. Rotors to be stored on edge,
not flat. Used to be the boxes were labelled.

That said, chinese metalurgy leaves just a wee bit to be desired - and
it is not out of the ordinary to have drums that are round when cold,
and eccentric when warmed up.
The Canadian made drums and rotors are quite often much better
quality, but it is not unheard of to have bad ones from ANY
manufacturer.
They are finish ground while still "green". In years past, they were
"aged" before final machining/grinding.