I recently sent an RCD Platinum receiver to Hitec, asking it to be changed from channel 38 to channel 14, and to be retuned if necessary.
Hitec received it Nov. 1, and shipped it back Nov. 4. They exchanged the crystal and retuned the receiver, though they commented that retuning is not necessary when changing crystals.
Their shipping cost was $5.80 (prepaid by them). Their invoice (cost to me) was $0.00.
Brian Morris