[Closed] Straight pull hub spoke calcs

I've deconstructed a 2015 Sram Rise 60 rear wheel and building it up on a Stans Crest 24" rim.

I've measured the hub per spocalc.io and have inputted these into DT's calculator for some spoke length values.
However, if I measure the deconstructed rims erd and plug these values in (incl offset), I get a spoke length result that's 5-6mm shorter than the spokes that came out of the wheel.

Measured spokes are 285mm. The only info that sram publish about their wheels are 280mm spoke length (R&L)
So, the DT calculator is pretty close +/-1mm to what Sram say the spoke lengths are, but the measured lengths send me off.

So, any other suggestions about how to figure out spoke lengths?
Being 5mm out on the new spokes would be a fail obviously.

ta