If it's that sort of difference that's fine.

What I'll probably do is at the next trackday I'll run the one without magnets with a good fully charged battery (the battery currently on the bike isn't good) and if it's OK for a couple of sessions at a time I'll get one from Tyga next time I order some bits.

Unless someone has one going spare, if so PM me, and don't put a "PM sent" reply in this thread...WTF is that about?
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Please do not PM me technical questions, if you can't find it on the Forum start a thread