Dear madross!
I would be grateful if you could clarify a couple of points, namely:
1) Is there any optimal and maximum block size for a NKAcoin? Or the more the block - the more reward and speed of its reception? Which is better - to have many small or medium blocks or one big?
2) Do I understand correctly that within 35 days from receiving coins on a wallet they become mature and there is no need to keep the wallet open all this time to receive a POS reward?
Big thanks in advance!

I myself prefer 1 block of coins when I'm staking to save on resources and reduce the amount of transactions
Also yes the coins will mature after receiving them 35days prior also wallet doesn't have to be open during maturing but it does for your coins to stake how ever leaving your wallet open helps towards more nodes online and the network
Many thanks for the clarification, Sir!
One more question: I started the mining in the wallet and opened the log file.
What does it mean:
getblocks 1600572 to 000000000076dcf6516c limit 500
getblocks stopping at 1600794 000000000076dcf6516c
getblocks 1600572 to 000000000115a2da5373 limit 500
getblocks stopping at 1600802 000000000115a2da5373
trying connection 80.112.167.119:17421 lastseen=390221.9hrs
getblocks 861468 to 000000000019c8923063 limit 500
?