i should, i worked for atc ystems of wny… ive seen and (basicly) tested every vac on the market. ive seen shit youve never heard of
they all fail the light test … 100watt light bulb shined on the exhaust shows you a blizard of crap EXITING the vacuum
thats like putting prizoners in jail and leaving the back door to the jail open …
and yea, ive sold and epaired rainbows, so i know EXACTLY how they work, what tends to fail, and why they fail
and oh yea, atc ystems still has my neigbors rainbow in storage (they traded it in on an E in 99 or 2000) … its the 1935 model … it still works great … DESPITE the fact that the stator is cracked in half from 65 years of abuse