Bubble bag selection for hash rosin

Hi, I’ve been thinking about getting a bag rosin setup going. I’ve read some stuff about full spectrum hash rosin using everything from the 45u - 159u to press the rosin. My question is, if I’m only lookin to make hash rosin and not smoke any of the bubble would I be able to just use the 220u, 160u, and 45u bags? My thought is that every thing between 45u and 159u would get caught in the 45u bag. Which I would use to press into rosin. Any thoughts are appreciated.

Yeah if im mixin it all together im skipping some bags for sure.