I am looking to buy a new Titan Advantage 400 or Impact 440 Sprayer from my dealer. I will be spraying residential exteriors and some garages, doors and interiors on average about 3 times a month. It is unlikely I will ever wear these pumps out as my use is low and I am pretty meticulous about cleaning and maintaining my gear. My spray repair shop is urging me to get the heavily discounted fluid section that Titan offers to new sprayer buyers. His rational is that parts have gotten so expensive such that the whole assembly is a bargain relative to the individual parts that could need repair or replacement over time. In regards to the Advantage 400 an extra fluid section may be a good hedge against parts obsolescence as the sprayer is eol. I wanted to get others views on whether they purchase this add on and whether it is something worth my investing in.