Actually a thicker "tool" might help you in dissassembly.
It appears when you replaced the extended floor plate you failed to replace the spring to begin with. A longer magazine spring is required with extentions because you are making the inside of the magazine deeper(longer),
The orginal spring is still very much usable and should still function in the standard configuation.

From a Safety NUT
It appears when you replaced the extended floor plate you failed to replace the spring to begin with. A longer magazine spring is required with extentions because you are making the inside of the magazine deeper(longer),
The orginal spring is still very much usable and should still function in the standard configuation.
From a Safety NUT