You’ve been very helpful. To make sure I got this, the TL;DR is with a NExT I can copy my existing P40 into my implant; no trouble, not changes on their side. For the iClass I would need an xSTX, which can not be reprogrammed, so I have to convince them to accept it.
I also just found this thread Can you clone HID iclass to a xSLX chip? - #12 by Compgeek.
So overall it looks like the only real option for that card will be to get the xSLX (or Spark maybe) and convince someone with admin access to add my implant to the system on their side; it looks like it will not be possible to clone my existing access card over to my hand from what I am seeing. That adds a layer of difficulty there. [EDIT - your edit in response to my edit covered this. editing the edited edit to edit… wait… where was I? cheers]
Sorry for a million questions (or, rather, asking the same question a dozen different ways). With specific uses in mind, I want to make sure I’m getting the right toys for the job and understand the process. 