A machinist does not equal an engineer. An aluminum puck, when used as a air spring spacer (or any type of spring or shock) is not a static component once installed. Specific geometry and significant forces are applied to the system. Detailed engineering, testing and R&D is critical to safe operation of the modified vehicle and the aftermarket component itself. If anyone can produce some sort of engineering report for the Toddco spacer lift designed for the LR3/LR4/RRS platform, I will be shocked.
Multiple canister failures have been documented so far. This tells me that proper R&D has not been done. Modern Rovers with the Independent front and rear suspensions are worlds apart from "classic" Rovers that are solid axle. Solid axles cycle in a near vertical fashion and are much less prone to weird geometry issues of a coil spacer. Independent suspensions cycle in an arcing manner. By adding the spacer, you have effectively modified the fulcrum point to which the arms cycle from - different from Land Rover engineering design - resulting in component movement that is altered. LR did not allow for this in it's engineering. The arm now rubs the canister in certain extreme conditions.
This is not a rod-mod vs spacer argument. This is only an opinion which seems to hold water due to the reported failures by using this specific product.
