In addition to balancing the elevators today I also installed part of the elevator trim system. The 1/4" roller chain is stainless steel and it comes from McMaster Carr. They have a lot of unusual items that are hard or impossible to find anywhere else. I needed to shorten the chain by 8 inches. I used my Dremel with a grinding stone and ground the end off of one of the pins in the chain then with a punch I gently knocked the pin out. The turnbuckle is located immediately aft of the rear baggage compartment bulkhead. It's out of the way there but easy enough to access for maintenance or adjustment.