Nice to have coffee, but major design issues - Coleman Portable Propane Coffeemaker

Two major problems with the design of the coffee maker. 1) The cheap plastic check valve at the bottom of the water reservoir comes out almost every time you up the unit. As the unit heats up, the check valve expands at a different rate than the red plastic housing allowing the check valve assembly to come free. The pot will not brew without the check valve in place. Coleman doesn't thread into place or otherwise mechanically secure the check valve into place. It is held in place by friction only. Unhelpfully, the check valve only comes out when the pot reservoir is full of water and heating up to brew. Frankly, it is an amazingly stupid design. I have to start the pot running to heat it up, reattach the check valve by sticking my hand and a tool to poke the valve into place into the warm to hot water, then empty out the now dirty reservoir water and refill with clean before I actually brew coffee. 2) The reservoir does not hold enough water to make 10 cups of coffee. If you fill the reservoir with every drop of water you can squeeze in, 20 minutes later you have a little less than 8 cups of coffee. This is again an incredibly stupid design choice because the reservoir narrows toward the top and Coleman could easily have made the reservoir bigger to allow you to start with enough water to fill the pot. Fixing that wouldn't even make the storage dimension of the pot any larger.
If you can deal with the repeated stupid check valve repair and having to add more water to the reservoir mid-brew, you can live with this coffee maker. It is a great idea, but a horrendous execution. For most people, it's probably less frustrating just to get a percolator-type pot to set on a gas burner.