The LR1 Payload is compatible with the Astro Isolator.
If you buy an Astro + LR1 Payload, this isolator is already installed.
If you buy a LR1 Payload, you will need to upgrade your Astro Base with this vibration isolator.
Instructions for installation are here:
Astro Isolator is not hotswap compatible. To avoid damaging Astro or payload, please power off the aircraft before attaching or removing a Smart Dovetail payload.
There are multiple versions of the isolator, check to make sure you have the correct version
More information on Astro's isolator system is here: