Atto have a great range of high end frames, with plenty of options to build the kind of frame you like, The DC130 is the smallest of the bunch, but don’t think that small means slow. Around a track, the DC130 will keep up with most of the bigger 5″ frames with ease, but handles and corners like it’s on rails.
The DC165 is Atto’s 4″ race and Acro frame. it uses the same build as the 3″ and 5″ frames with a choice of lightweight 13XX or monster 22XX motors. At 50g it might just be the perfect frame for indoor and UK tracks.