Bests & Worsts Reviews from Amazon

So I have owned this graco ultramax cordless sprayer since May 18 of 2019. I have maybe put three to four gallons of paint thru this device.. Now I have bought the solvent type model to spray oil based and varnishes. I have not, repeat have not ran oil based paint thru the device . The sprayer now will not spray anywhere near what it used to. I called tech support on the box (they have number on boxwhen you buy the unit new) I called the number and told them what was happening. So it turns out the seal between lid and flex liner cup ( 32oz. ) Is not making a tight seal enough to create a vacuum . So the person on the phone says your pump is fine your unit works. Yes, but its not spraying properly. However they said the lid on the cup is a wear part and can be bought at home depot or lowes. I said so I have to replace lid everytime I run 2 to 4 gallons ? He didn't state , but continued to say that's a wear part. You can buy it at hardware store or where ya bought it. I told him I bought it on amazon. He didnt care but.. my issue is, This unit is the solvent model. Oil based paint is much more harsh , on products and equipment. How can this seal hold up ? Its not holding up to water based paint how will it last.? Its not going to. I have been to evey home depot or lowes in my area. (Seattle) no lid no flex liner cage replacement anywhere. The liners I can find but the lid that screws over the flex liner to keep air out is no longer effective, making the cordless sprayer useless. These units run around $750.00 its exspensive !.. The unit does not last. Its not reliable, no replacment parts and the tech service was useless. By the way I replaced the black air valve for bleeding air out. This part is given with the unit as an extra, actually they give you two in the kit w the sprayer. But they do not give a new gasket or lid with the flex liner cup system, which is vital to using the sprayer. I cannot find a replacment part for the lid anywhere. graco support says you can buy the part cause its a "wear part " . Basically saying we dont cover or replace vital parts that make the unit work properly, "wear part" I had high expectations for this ultramax cordless sprayer, given the price and brand graco. I no longer have faith in this sprayer anymore. I dont do painting for a living but bought this spayer to do small jobs around my home and cabin. I cant Imagine having this tool to depend on for a professional painter. 10/14/19. Update I have replaced flex liner system, cup and lid. The sparyer is not working properly. After 5 months.. Maybe 3 or 4 gallons of latex paint. This sparyer does not hold up well. I called customer service again. They want a receipt copy and they will send out a new pump. So to sum it all up.. pump failure with very little use. I keep it clean always after use. So I will get a new pump, install it and hope the cordless sprayer can put out 5 more gallons before another pump failure ?? .... Ok.