I decided to renovate a Japanese super-strat that I've had since 1987. It has an un-licensed(!) Floyd-Rose style trem with a locking nut and fine tuners at the bridge. While I blocked the trem during set-up I noticed that the sustain doubled and the guitar was objectively louder, even when played acoustically. I considered for a moment the idea that I might block it permanently, but after some research discovered that this Tremol-No upgrade gave the trem the same properties without it being permanent.
The device replaces the claw with its own, and adds a rod-within-rod mechanism that sits between the springs. A clamp attaches firmly to the bridge block from the other end of those rods. When the trem bar is flattened one rod expands, when the trem bar is sharpened the other rod contracts. Both rods have pressure screws that restrict movement for a given direction - in fact the expansion rod has two screws to double the locking strength so you can break a string without disastrous consequences.
It is a lot neater that gluing pennies between the bridge block and the body routing of the guitar, and as I said, you can decided from minute to minute if the bridge is floating, back blocked, forward blocked, or both.
Installation was fiddly, but not impossible. I also note that the single screw section doesn't really get tight enough unless you remove its O-ring.
