The item is currently on sale and we have no information on if or when it will be available again.

The requested dimensions of the base plate with contact to the seat of the vehicle are as follows W 29 cm, L 30 cm. However, the mounted child seat is wider and deeper.

Absolutely. You have 14 days if the product is defective. However, it must be returned in its original packaging, otherwise the return will not be possible.

No, in any case I always recommend buying the seat and base from the same manufacturer.