Bilo

I have a quick question and I am sorry for asking because I am sure it gets asked all the time but I was unable to find a solid answer in my search. Some friends and I are currently playing on Island (Default) and I am trying to figure out how to change the settings so that we can get 150 max dino spawns instead of the current 120 we have. From what I have read I need the offset to be set to 1.2857 with a difficulty value of 5 but with the modify server button it will not let me go over offset of 1. The only option I have found so far is setting map to Custom and adding in the parameters manually, is there any other method I have not read about? My friend is concerned by switching the map to custom we may lose dinos, buildings, gear ect so I am just wanting to get a concrete answer on if that is the case or not and if this is safe to do for our current map/world. Thanks a ton!