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I found an article I think you’ll find useful;
https://urbanvelo.org/issue3/urbanvelo3_p46-47.html
Seat tube angle; by putting a setback seat post, you’re making the bike longer and possibly make it too long for you, and even a setback seatpost isn’t really enough to push your saddle back enough to be able to actually put weight on your saddle to reduce the sheer amount of vibration coming up from the front end of the fork with its steep head angle and small rake.
The more trial the less twitchy, like typical track bike.
Funnily enough the trail on your bicycle is very similar to a typical road bike (typically between 50-60mm), which is regarded as a good balance between twitchness and stability.