Can I use an OAD from the 200 / 300 series with the 400 series Touch Bar Range?

No, because the bolt-through fixing positions are different. Also the 410 OAD from the Touch Bar range can not be used with the 200 / 300 series range because the mechanism only rotates in the one direction. All accessories need to be listed on the Manufacturers Declaration of Conformity, and using any accessory not listed will negate the CE marking.