Hi Big Fish
I was not charged extra by BestTech.
And yes, 2 days is better.
1) Once your aircon contractor setup everything... and your renovation work is still in place, the dust and ashes will stick to your aircon blower.
2) You probably dun want your contractor to turn on aircon and enjoy their afternoon nap.
Common and best practice, trunking to be performed first. after the first coat of painting, install the rest. The reason is: The bare wall is powder coating... if no paint is being applied, it will keep dropping via vibration/scratches and etc. I heard that extra fee from Gain City can be waived, you should bargain and bargain... hehehehe... $80 leh...