@barracuda72 thanks !! this was the answer

Thanks for the reply. - I ran two g32,s and did an M665 in between and you are correct, there is quite a variation. Im a bit lost now ....

--------snip
10:35:21 AMM665
Diagonal 224.846, delta radius 124.715, homed height 210.551, bed radius 85.0, X -0.535°, Y -0.678°, Z 0.000°
10:34:52 AMG32
Calibrated 7 factors using 16 points, deviation before 0.092 after 0.072
10:33:52 AMG28
10:33:19 AMM665
Diagonal 219.065, delta radius 123.289, homed height 210.595, bed radius 85.0, X 0.060°, Y 0.254°, Z 0.000°

Hi,
I have a kossel mini i have put a duet wifi in, am using an IR probe for bed leveling.
The problem i am having is i will upload a stl of my design, ie: a simple triangle, and the first print is dimensionally accurate, but subsequent reprints are 2-3 mm smaller.
Deleting the file and re-uploading produces the same results.
I have g28 and g32 in my slicer config.
any ideas would be greatful?

thanks.