Welcome @Dedo.
I can’t talk specifically on the Silverstone and YDS… so here’s my general thoughts…
I’m a big proponent of running what you have at first. “Better the devil you know”. It’s probably worth getting it checked on a flat plate and scaled before the season begins. I know conventional wisdom would say 32mm frame is “stiff” but there’s so many other factors at play (Tube layout, geometry, tube wall thickness, metallurgy etc) that I’m hesitant to say that there’s no way it will work.
Tune the kart with an open mind, by that I mean make some assumptions before you hit the track, but be willing to dismiss them if they are not working.