When 1st hits, you should be riding 5-6 (+1 -2) on the heat, depending on the level of the roast you like, shooting for about 4-5 minutes from start of 1st to the end of roast no matter what the roast level.
I just got my first roast in.
It took me 12 min to get from dumping in to onset of first crack and 15 min 25 seconds to terminating roast at outliers of 2nd.
So I think I turned down the heat too soon (I dropped from full power to 5 after 3 min into the roast) and once I came up to 6-7 I picked up too much speed and rushed into second a bit heavy on the gas pedal.
Next time I will drop from full to about 8 at 3 min then to 5 at about 5 min into the roast to see how that works out.
All in all I am happy with how this roast went and it looks great.
Some vitals to look at/comment on if you guys want are as follows:
Dumped in 250g at starting temp of 275
Hit first crack at 12 min.. temp reading 382
Terminated roast 15 min 25 seconds at a board temp reading of 428f