  The multi-anode sensor ACHINOS revolutionised the capabilities of the
spherical proportional counter by enabling large-size, high-pressure, operation
and TPC-like reconstruction capabilities through individual anode read-out.
First measurements with an individually read out ACHINOS are performed, which
enables improved calibration and response homogenisation. Experimental results
demonstrating the improvement in energy resolution brought by the individual
anode calibration are presented. These are complemented by detailed simulation
studies on the effect of sensor design and manufacturing imperfections, and how
they may be corrected both in hardware and analysis.
