First of all, the authors would like to thank Nick Shirlaw for his interest in the paper and for providing us with the opportunity to present additional comments and to clarify certain aspects of our paper that may not have been clear.

Nick Shirlaw states:

Actually, the section of the central disc has four double discs, which is equal to eight single discs. Thus, the correct number of total discs (including those of the central one), was 43, since one disc was omitted in the gauge area to increase the angle and consequently decrease the discs’ spacing. These 43 discs...

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