im not trying to bash products here. but in eight years ive tried corner gaurds a few times but found they werent worth the trouble unless youre trying to impress a customer with buloney. ive never gouged a corner that ive noticed and yes i do pay attention. i dont pull hoses around corners, i pick them up as i go. and my machine pulls the hoses back too, thats why i leave slack in them. i assume you have enough hose to do that.
i also see your hose is crushed a bit in the pic. how much vac are you losing by doing it your way?