The rear wheel of my Deore DX / Matrix Titan Tour wheelset was a perplexing build. Taut spokes but the spokes still had large arcs like they weren't fully tensioned (but were). Spokes too short indicating a rebuild of some sort, but mint rims that would have been original to the Trek they were built for. 3/4 of the spokes on the rear were of one length, the other 1/4 were just 1mm longer. Too much alcohol and not enough brain power in that operation.... [I fixed it with all new spokes and nipples and the world was again right for a moment]