Running chronograph continuously

Is the chronograph function on a 3717 (or any chronograph generally) designed to be run continuously? It appears from prior discussions that it may affect the accuracy, but will it cause harm to the movement?

I've also read it may possibly slow down the watch due to the increased amplitude. My Spitfire is running about +6 secs/day so I wonder if running the chronograph for several hours per day, or continuously, will net out that difference. However am I creating long-term damage to the movement by doing so?

Some chronographs will perform better long term than others. The automatic winding mechanism of IWC's in-house chronograph generates enough power to run the chronograph long term when worn. This chronograph complication has been advertised as capable of functioning as a second time zone when set/activated at the correct time with no real effect on timekeeping accuracy over long periods of time. I have not noticed my 7750-based IWC chronographs suffering accuracy issues or running out of power when used long-term but I really have not encountered a situation where I needed to run the chronograph for extended periods of time (more than 12 hours, plenty of time to smoke a brisket or pork shoulder). Using a chronograph to attempt to offset time gain is not really practical but if you find it enjoyable or entertaining, go for it - it certainly should not damage your watch any more than normal wear and tear.

I sometimes let the chronograph run for a while, to make sure this part of the movement keeps on functioning well. But that is all: why risk wear and tear when not really necessary?

Kind regards,
Paul