I don't want to talk hobby again, but this thing about notations like 9/8 and 6/8 proves the quick diffusion in western options when it comes to 'odd' time-signatures. If these things would be approached from a more mathematical perspective (also better fitting in electronic conditions i.m.o.), things become much more clear.
Then cdnalsi's restrictions can be translated into : No powers of 2, only prime numbers as a basic for a repeating cycle.
Then a cycle of 10 is ok too, because it has the base-number 5. In that view both 9/8 and 6/8 are based on 3, so ok too.
I didn't want to have a never-ending compo. Besides - 20 days. Can't you come up with anything in 20 days?
A never-ending compo could be a nice idea for another project.
Of course I can come up with something in 20 days, but it probably would still be in some embryonic state, not satisfying enough to my taste to publish it. But I will go along with Snu now : I will try.