So many questions...

OK, sheet flm is on 170 micron support so no flimsyness here.
35mm and 120 are on 100 micron PET (just like CHS 100 I was).
The reason for the 120 delay is caused by our large slitter needing to be converted to 61,5mm. Takes some time.
The small slitter is not fit for film anymore. We only use this for backing paper now.
46mm would be another adventure. We have no backing paper with the correct numbers printed on.