Why do we need a hardfork at specified block?
Which purposes of the hardfork and will it help to solve technical issues of current Bitsum network?
By the way, I would like to give you basic listing rules of graviex.net exchange to consider. I am not sure this one supports Cryptonote algorithm or not. You can ask them to verify. Here is link to their listing rules:
https://www.gravio.net/blog/graviex-listing-rulesI hope that graviex.net exchange supports Bitsum algorithm so that we can ask for listing the coin on one more exchange.