If going with goolrc servos is what you want to do then go ahead, but I myself have personally had really bad luck with anything electric-wise from gool
I've never heard of that brand before but it's good you're having fun, my personal experience with my 1/5 scale losi is the stock one broke and I bought an AGF servo and haven't had problems since, definitely would recommend it for a 1/5 scale but I'm not sure how it would work in a 1/7, could...