Um, what?
From what I can understand, you are asking someone to remove the modes on your Trustfire Z5 light and turn it into a single stage light right?
There are three ways to do this that I can think of off the top of my head. Reprogram the microcontroller in the driver, which would take time and extra money for the clip used to access the microcontroller. Go around the microcontroller, as in remove the microcontroller from the circuit by bridging specific pads on the driver or removing the microcontroller and bridge the right pads again. Third way is to replace the driver with a single mode one. The cheapest of these choices is to bridge pads on the driver, but that would require you analyze the circuit and see which pads to bridge, or if it is a common driver, find somewhere online that tells you which pins to solder. Simplest is probably to replace the driver.
What are you using the light for? Will it be gun mounted?
:welcome: