Linking within a drawing?

[Barnoe]

I am currently doing a drawings and it has become 5 parts.

what i mean by that is, i have the same drawing but its a step by step so part1 then becomes 2, 3, 4 and 5 each with things changed

but the basic base drawing is the same. all this is in a single DWG

I would have used an XREF if i had known, but even so can you have 5 instances of an XREF in the same drawing?
 

The problem i am having is the boss wanted some changes today and i had to change all 5 parts.
Is there a way to link them so when i change the base drawing it updates the other 4.

 

i hope that makes sense.

 

 

[Barnoe]

Update:

 

I've come in this morning and with a fresh brain come up with a workaround.

I made the drawing a "block" meaning I can make several copies of it, any edits change every instance.

 

it will work for now.