Sorry, nothing new on this topic. Right now Fwd cars take all my energy. The T4 didn't drive for a long time.
The KR-MF has evolved to nearly complete car in the meantime. Little changes and setup work are the daily work. Not very much left to do. Several friends mentioned to build a stainless steel chassis for it. If I could realize that, it will be one of the last things to do.
My guess is, that I will use the T4 outdoor again and then optimize again