Quote - I bought Daz's M4 Morphs and Elite pack a little while ago.After loading M4 base, I load INJ Base M4, INJ Elite M4, INJ Morphs++ M4. At this stage I load Jeremy MAT_AO.

In general, you don't need to inject a whole bunch of morphs that are not going to be used.

In particular, the Jeremy injection pose has a readscript that put in the needed morphs for that character.  To get the basic look, you need no others.

As example on head, it uses "Jeremy" at 0.500 only.  If you inject all the other morphs, 22 of them have a value of 0.000 showing.
This is not saying others are not useful, they can be added as needed in developing scene.

If you have a marginal computer system, this can make a difference in the stability.