Hello to all.
There is a new frame in the house. It’s called Woopitinum and designed for 2,5" props, 11xx motors
and 16 mm x 16 mm stacks and with some reservation also for 20 mm x 20 mm stacks.
Therefore 2S - 4S setups are possible.
Show here for more details. https://www.smartshapes.de/en/product_info.php?info=p352_whoopitinum-2-5--micro-brushless-vertical-frame.html
I hope, you willl like it.