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plus a fair amount of luck, at least in that particular race.
but yeah, part of racing is the obsessing over equipment, some do it to get a bit quicker. I've definitely plateaued (and coming down the other side) in terms of speed but still enjoy "designing" a bike that will allow me to be reasonably competitive, get me through muddy races on a single bike and not end up blowing all my salary on it.
I'm not as fast as I once was but can occasionally trouble the front of a race out here in the shires. South West regional champion on a singlespeed with inner tubes last year.
@fredtc is probably much faster than I am nowadays, but we haven't raced for a bit.