Yes i have seen some chips fall into tool changer but still that is small amount and with regular cleaning that should not be problematic.
That type would be most space saving ATC that i can think off. ATC gets quite large with SK40 tool tapper
I would use umbrella style tool changer as that would be easiest to make but i need a lot of space for plate in 650mm diameter to hold 24 tools.
Sadly i cannot make machine any bigger, footprint as of now is maximum available to me, maybe i could squeeze additional 100mm on each side but that is all.
I have thinked about tool changer like this
But this also need to be mounted high on top of the machine. My whole top machine is space for moving column so i dont know where to put it without getting in way of column.