The Atoll Standard Plate from Silence Corner is compatible with mirrorless cameras that have a shorter flange distance.
The Atoll S for Sony Mirrorless and Atoll C for Mirrorless cameras includes the Standard plate as standard. If you have the Atoll D for DSLR and are looking to mount the Atoll D onto a mirrorless camera then you can simply change the Extended plate for the Standard plate to ensure an accurate fit.
The Standard plate is Arca-Swiss compatible as well as being compatible with capture clip accessories.