Do you asperate when using 1/2 slins in side delt, trap or tricep? Thanks.

Also, there was a supply issue so I'm switching to Test C from E. I pin on Sunday morning and Wednesday afternoon. So I need to overlap, right? I need to pin C before my last E pin to avoid a drop off? So pin both E and C on Sunday and then pin both E and C on Wednesday and then I can drop E, correct?