"Edward Chimtey Hands" or "Kaato Leg Joe"?
The premise is intriguing. The implications are many. Would the former relegate you to forever chimta player status? Would the latter make the time period that you call your life the most unorthodox kaato segment ever?
Here are my thoughts. Chimtey & kaatos are defined by their function - they are instruments that when played make a specific sound due to their construction and material composition. Changing the material of composition may change the sound created due to the difference in mechanical properties between compounds. (Side thought: A kaato could also be defined more by it's resemblance to a squirrel than the sound it makes, but eh, let's pretend I never thought of that).
With that being said, I think it's not only the limitation in normal-day-functionality that should be evaluated, but also the biocompatibility of the materials used to produce these aforementioned implants. Getting a chimta or kaato surgically attached as limbs should ideally not only mimic the strength, stiffness, density and fatigue, but also shouldn't elicit an inflammatory, immunologic or carcinogenic reaction and simply be biocompatible. It also shouldn't prevent you from getting laid because then you: sterile.
With that being said, the question is stainless steel (chimta) or wood (kaato)? Stainless steel has a long history of being used an a biomaterial and as implants. The chromium oxide layer in stainless steel provides good protection against rust and corrosion in atmospheric conditions. Unfortunately, despite being biocompatible and possessing the desired mechanical properties, the site of implantation in side the body may seen corrosion in the long run due to body conditions. Wood, on the other hand, may see benefits in more extreme temperatures. A wooden kaato leg will retain heat better in frigid cold New England temperatures - I wouldn't be at risk for frostbite every time I stroked my beard. However, the mechanical properties of wood make it much less desirable than steel plus I saw that one episode of Once Upon A Time and wood was not a good look on Pinocchio. Also, good form and effective thrust potential are more dependent on strong legs than capable hands.
"Mourning Wood" or "Man Of Steel"? It's chimta player status for life for this dude. Sh-sh-shaken, not stirred, baby.