Max bps on stock Epiphany?
The stock board is capped at 17 bps. The Egg advertises 23 bps but that’s a drop test and the max it could reach. On-gun feed speed is probably 4-5 bps less and isn’t consistent, so in reality the average feed speed is probably closer to 16-18, which is coincidentally the cap on the Epiphany! But unless you use ramping all the time, you won’t physically be hitting 17 bps, anyway. The average human can probably shoot 13-15 bps max – our fingers aren’t naturally designed to shoot fast, ya know? Some pros can reach higher than that, like in the 20s, but not consistently. As for the Freak insert, it probably just comes with one, the .689. Can’t help you with the air chamber things but the manual for the gun will.
