Carv is designed to function in a fully enclosed alpine ski boot, with the insert fitting between the shell and the liner. We therefore do not guarantee compatibility with apex/dahu boots, however we have had multiple accounts of customers successfully installing and using Carv with this type of equipment. In these cases the insert fit in between the "walking" boot and the outer exoskeleton.
You will need to ensure there is somewhere on your boot for the Carv tracker to attach. This will depend on the specific model of boot that you are using.
Due to the repetitive insertions and removals of the liner, you may find you get increased wear of the Carv insert. Although this shouldn't affect the functionality of Carv, we suggest that you apply additional adhesive tape (provided in the box) when securing the insert and take care when stepping into the Apex shell.