Mini, Midi and Maxi were basically the same design in different sizes. I flew them all with success – the Midi with a ST23 is a moving machine but the Maxi with KB40 was my favourite. Handled power very well but the glide suffered a little due to the low aspect ratio (6) though not too noticeably on the Maxi.
There was also the big Mother of Pearl for .60s, which I had ready for doping but had to leave behind in England. Express and Pilfered are subsequent developments of the design.