I just use a 5 gallon bucket and about 40-45 ft of xjet hose tied to bucket so it wont get pulled out, set it at the top of the ladder on the roof, When it needs refilling I have my ground man fill it. I walk the roof, its peaks & valleys, just be careful not to step on the xjet hose, its so darn slick, also be careful pulling your pressure line on the shingle, the 1st 1 or 2 roofs I did it got caught. I pull plenty up and drape it over the other side of roof. I also use a gun with no wand its easier to handle when running around the roof
Heres some pics of a roof we did a while back, you can see the bucket at the top of the ladder in the 1st & 4th picture, the 4th pic is another roof, you can see xjetting does just fine. A lot of people would say carrying bucket up ladders is unsafe, thats why a shurflo type set up would be safer. I have no problem with Xjetting its less equipment I need to carry around
Jeff