replay uploaded on first page.
detector units : reapers for terran, sentry for protoss (zerg unit dunno)

probably because the banshees kill them too quickly.
If I see the other starts building stealth units, I quickly pop up 2-3 reapers just for detecting.

I've not used pylons before. somehow don't have the luxury to.

just learned recently you can save an early nuke by building a cannon and mass repairing it instead, as shown in the replay!