Hi, due to personal circumstances, I am selling my R6581T.
I have attached a picture showing the last stability test I did with it. It is reading a 732A, and being compared to my 3458 and Solartron 7071 (modded to 7081).
If you want any further testing done, I am available, just limited by my free time.
The asking price is 2000 EUR + shipping, but it's flexible.
If anyone is serious, feel free to make an offer.