I recently got to shoot a .22 RWS 54 and loved it. It was super accurate, easy to shoot, no hold-sensitivity, etc. but was a little lower power than my TF-89. That got me to thinking. After seeing pictures of how the 54 action is designed, why couldn't someone build a similar design for the TF-89?
I'm thinking of buying another stock and making a channel system that would bolt to the inside of the stock, similar to the channels on drawer slides. A roller dolly would be built that would bolt onto the action. You could use the steel ball/detent idea to secure the action in the forward position until firing. The only question I'm pondering is what to do about the trigger. Leave it attached to the action and slide with it or secure it to the stock and make some sort of extendable linkage that would allow the action to move but the trigger/guard would stay in place in the stock.
What do you think? The only complaint I have of my TF-89 is the hold sensitivity.