ISE Guards
My old ISE PRO77 came with two guards. I never used the secondary one, as it made the stopper too difficult to seal.
The permanant guard was also starting to "droop" with age, and with that it would spit up more and more.
I hated the sound too....like there was no cover at all.
I had an ISE made Viking installed for a few months last year. It worked pretty well and was quiet, but the guard drove me nuts.
I am really very fond of the little Waste King I have installed now, for the smaller MOL WAste KIng it works very well, and eats everything I give it, including bones and even walnut shells now and again. The only thing its kinda slow-ish with is citrus skins, I remember it chewed a lemon rind down over a period of days... The ISE was much faster, but I also wonder how well it ground the stuff up too.