RGH One CHIP that glitch all X360 ?

So i see allot of chips for freeboot for different x360 revisions,
will i be right if i buy bulk of CR3 lite to use on all the x360 and have customers happy ?

Or i still should buy different chips for different x360 revisions of phat/slim.
I know that install can be done in various different ways with different xecuter products, but
i'm looking for one type of product that i can use on any X360.

Thanks.