If you’re having to adjust the rig tension each time you furl or unfurl, presumably you’ll also need to adjust the forestay to avoid a wrap. At some point you’ll be tired and/or distracted and will forget one or the other. (I did anyway, during my brief and never-to-be-repeated experiment with a cheap swivel). I’d rather give up coffee/beer/meat and get a high quality top swivel (but reefing’s better). Harken high-load will do the job, others might do, some won’t.