Unless I had personally cut apart, cleaned and reassembled the fuel tank in ANY ARF I would never run without an onboard filter (I would likely cut the tanks open in any case). I have seen too much junk in the tanks, and junk that flakes off over tine

Clogging the turbine is a problem but in my experience, crap clogging the shut off valve can end up blowing the motor up (to say nothing of the potential hot starts). I run the filter between the pump and shutoff valve for this reason.