I can't give you a mathematical answer, but I'll give my thoughts. In my home obs I use sky 6 and old tpoint with an eq6. In my remote obs I use a paramount and skyx with integrates tpoint.
Although the sky 6 is more stable than sky x, I have found that when tpoint is added to sky6, I get a lot more crashes.
I dont use the skyx at home, I simply cannot get it to run reliably enough working with ascom, as both my observatories run autonomously, if I get a crash in software, more than likely I'll crash an ap130 scope into a pier, which is something I am not keen to do. I do not have this problem with the pme as it has mechanical stops.
Tpoint is completely integrated into skyx and not an add on, still it must be purchased.
In my remote obs, I have had to use sky6 to 'rescue' the mount when the skyx crashed it, and even with a reset would not slew the paramount.
One really nice feature of skyx tpoint is the supermodel option, essentially it works out what terms are applied automatically. It also has a automap option, but aag tpoint mapper works better anyway.
Brett
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