The RMK shop may have issues with their Thuya Burl..."BUT"...(There's that word again)...I have sold hundreds of their fine knives, handled in their Thuya...and "never" had one returned for any reason.
It may give 'em fits in production...but afterwards? not-so-much. That's my dealings with it. Your mileage may vary.
Capt. Chris
PS: Below is a large block of Thuya, which was loaned to me by the shop...along with the 1st Hunter they made...FYI!...CCS