one of the best timber style calls IMO would be the Echo's Timber Call. Try that if u arent sastified with RNT's Timbre. I don't have to much expirence with the Timbre but I do like their Daisy Cutter and Short Barrell. But, yes you should be able to send it back to get it retuned, just call RNT and tell them whats wrong, they should be happy to help.
It's an Obsession