can just cut down a bucket and put a grit guard in there. just make sure theres not too much water, all the pad washers are is a 5 gallon bucket,a grit guard, and some simple plastic piston pumps...very simple idea, is it worth 135$? not to me for a 5 gallon bucket!.....i just don't see the point in spending 135 on a pad washer.....ill stick to my normal method after done with a pad toss in bucket with some apc and dawn added, then if you need clean pads brush em,rinse em, spin dry on rotary.i just try to think of one thing when im about to buy something and that is "do I really need this for one simple thing"but answer to your question the megs unit and the grit guard unit is the same thing, there is another pad washer with some gear looking things in there but i believe its for a rotary and wool pads....maybe if the pad washers were 40$ i might buy one but as i said i refuse to pay 135 for 5$ worth of plastic....