Modifications to routers voids all warranty rights with manufacturer and therefore shall not be returnable under warranty terms and conditions.
Do not open the router once modified, doing so may/will result in damaging the new antenna outputs as they have been positionally placed within the unit and therefore any attempt to open the unit may causing damage to the antenna outputs are a chargeable repair.
Sending the router is the responsibility of you "the buyer" and should be dispatched fully insured and tracked. loss or damage to the router in transit is the buyers responsibility.
Modifications to the routers are not reversible and therefore are not returnable to us once modified.