Some honest advice of how you will need to ultimately defeat "Gavincoin" from occurring and/or destroying any antiquated remnant fork:
Start buying more asics and insure that you control at least 6% of hashrate at any given moment.
I have absolutely no idea how many miners your small group currently has but it is certainly possible if you invest enough, quickly enough, you may be able to prevent this from occurring or at least delay it.
You will need at least 20,085,506 GH/s and growing as difficulty is increasing in 6 days.
An investment of 17,390 ANTMINER S5s should do it
https://www.bitmaintech.com/productDetail.htm?pid=00020141223160858878EmLu6L5Q067Dwhich when purchased in bulk will cost over 6.1 million dollars .... but you will likely have to source miners from all companies new and used due to limitations in stock and asic retailers scamming you so costs will be much higher. Of course some of you may already mine so it would be a good idea to get together and figure out how much of a group buy is needed.
cheers.
it would be easier for them by making a reward program where mp sends coins to any coinbase (miner-address) which does not advertise it'll make bigger blocks.
thats the best way i can imagine to prevent a fork - not that i want them to do that...