Manual RAID 1 with partitions

So, I'm trying to create a RAID 1 with a few partitions. I followed the steps I believe are necessary which are:

1) create all partitions equally on both drives
2) create the arrays and create a filesystem on them
3) update mdadm.conf (DEVICES and ARRAY lines)

Now, I noticed that upon reboot mdadm assigns the device names /dev/md125 /dev/md126 and /dev/md127 instead of the originally assigned device names i.e. /dev/md0 etc.

The "solution" to this would be calling

update-initramfs -u

but as I understand it, this would have to be done each time the kernel is updated?

Is this procedure about right? Any other tips or best practices I should be aware of?