I can’t speak for the Jacobs machine but I do have some of their molds and injectors. Seemed good except the molds had different sized ports. Bought a mini shooting star and these were the only molds that I could not shoot with it due to the sprue port size being smaller. Messaged Jacobs asking about the size of the ports so I could get sprue extenders made just for it and he asked why I needed to to know so I told him. His response was good luck with my overpriced hand injector (shooting star). Never have I dealt with anyone so rude, petty, or horrible to do business with and I will never again buy anything from there. If you cannot handle your customers purchasing from other places as well then you shouldn’t be in business. It’s no surprise he has no social media accounts to leave reviews on