Filters having parameters with ranges which are not clamped are not conveniently handled in Sampler: when entering an out-of-range value, the slider doesn't update, it remains either on the far left or right position, therefore we cannot use it within the extra range.
Here is an example with screens below: this is a float3 with range 0..1. Since it is not clamped, it is possible to use values outside that range by entering them directly. When doing this in Designer, the slider gets to the center of its UI so it is possible to use it above the new value. This is not the case in Sampler, slider remains at the right end of its UI making it impossible to move right further more. Therefore we have enter all values outside range manually.