A (V. B.): I agree that there are other phenomena at high-rate measurements of aging besides the space charge resulting in many sources of systematical errors. We propose to exclude one very big systematical error associated with a saturation effect of gas gain by correcting the procedures used for aging rate measurements. After that we can understand other high rate phenomena. See for reference: V.E.Blinov, Nucl. Instr. and Meth. A419 (1998) 676.

A (V. B.): I did not say that rates of plasma polymerization reactions in avalanches do not depend on the space-charge effect of gas gain and that we can exclude this dependence by modification of the procedure used for aging rate determination.
I said that we have two different systematical errors for the aging rate measurement in high current tests. The first error comes from the dependence of rates of plasma polymerization reactions on the sense wire current density and we cannot exclude this error. We can only reduce this error by reducing as much as possible the current density to realistic level. The second one comes from the dependence of the measured aging rate on the gas gain derivative dG/dV at measuring point for HV. dG/dV depends strongly on the sense wire current density and by modifying the procedure for aging rate determination we can exclude this source of systematic error.