Why limit the gain to 100? There are situations in astroimaging where a higher gain may be desired, knowing that the dynamic range is reduced. For example, plate solving and focusing will benefit from higher gains to reduce exposure times. A wide dynamic range is not required.
Is there any way that you can modify the ASCOM driver for the ASI 2600 to allow the full range of gain to be set manually or programmatically from SGP, etc?
Mark W