custom tft??

i just think it would be an awesome idea to put tft in the customs! my whole family plays league but most of the time we play customs together, but we love tft so much we've been playing it more often then not. the only thing is we really just prefer playing with each other! also i fell it would be really good for practicing comps without playing an actual normals. So i was wondering if you guys are making a custom tft or not? and if you haven't thought of it i highly recommend, if you're not gonna make it mind telling me why please? thanks so much!