Where did you hear that there's "similar architecture" to the VC Cal 2755? I'm not sure I would consider that to be very similar architecture; for instance, one minute repeater is entirely user powered (user powers the MR by sliding the slide, MR operates when watch is wound or not wound), and another is spring powered (MR operates only when watch is wound since the MR mechanism uses spring power). You may need to ask for more clarification from whom you heard this from. I'm dubious.
As for Gokarting with a repeater, yours truly was wearing the watch while go-karting. Another moderator at the time even suggested that this was "abusive" to the watch. But nobody had a good suggestion of where to store the watch where it wouldn't be lost. So on the wrist it went!