I have no interest in convincing you of anything (as posted, I have never even used a bench mounted and therefore have no opinion!), but I am honestly curious why you think a bench mounted will be better than a wing capper. Like I posted, I have heard similar from other homebrewers with never understanding why. "constant adjustment ( bell is constantly slipping)" is completely new to me (I cannot adjust anything on my wing capper). Is that maybe an issue with only certain wing capper models?