Disappointing 408 Results - Sad No More!
I'd recomend shifting at a higher point in 300rpm jumps. Then when the times fall, back down in 200rpm jumps till it picks up. then back up in 100 rpm jumps. Keep at it till you find the best point of shifting by going back and forth in this manor.
I'd also do this on launch. But ethier test launch rpm first or shift rpm, not both at the same time. (I think launch should be first to test for lowest 60 ft. times)
Any shift light that is easy to see is a good canidate. Mount it right in front of you.