Do the DRL's shut off when the handbrake is applied?

That's where I installed the mod on my Firefly (Metro) - I put an ON/OFF switch inline with the contact switch in the handbrake mechanism. Mounted the switch in the plastic housing around the brake (you could run it anywhere you want, I suppose).

Now I can choose to turn the lights off where their contribution to safety is negligible (ie. on a divided multi-lane freeway).

Welcome to the forum, Will.