Reworking the app from EnergoPro for a furniture production. The assembly structure is the same, it's just a matter of adding dimensions. The plant is just one large house on šećerana, actually on the other end of the park, at the crossing at Vida's (nobody remembers who that was, and nobody even calls it that anymore; my grandma always did).
Eventually got this to work more or less right, but we never had the time to guide them through the process. However, when I appeared here a year later to ask for a piece of polished board, for Go to use for drawing, they just cut one to dimensions and refused money*.
At the same time, Ileš was messing with .opl files for the little psionorg.
Around this time we switched the heating again. After two winters on electric heating, and two on coal, we're switching to gas. Vlasta came with some second hand tankless water heater, and installed it in parallel to the existing systems. Also drilled a hole in the chimney to take out the exhaust. The trick with the gas heaters is that they activate on pressostats, i.e. when you start running water through them, they open the valve and gas burns. The heating body is a set of thin pipes engulfed by the flame, so the water flowing through them heats up quite nicely. And it's entirely automatic, the flow of water will be regulated by the thermostat in the room, which will turn the pump on and off, and the pump will create the pressure.
Not so easy. The pressostat was originally designed to react to the regular pressure in the water pipes, which is usually above 1,5 bar; in our case it's 2,5 bar. The pressure in the heating pipes is about 1,5, but the heater should react to the pressure difference, which the pump should provide - but a 60W pump can't do much, and doesn't need to. It's the pressostat that needs to be adjusted to be more sensitive. Which Vlasta did by replacing the spring with a weaker spring, namely one from the ballpoint pen. Which was still too strong, so he'd cut it shorter. The trial and error took some five rounds until he got it right, and each time he had to take out some four parts before reaching the spring, then shorten the spring for one more round, then put those four parts back, then refill the system, as he lost some water each time, then try it out. Took a couple of hours, but eventually it worked, and worked swimmingly. No stoking, no cleaning, just turn it on in november, turn it off in march. Perfect.
The only trouble happened when the gas would run out, which happened once or twice per season. First, the trouble is that you don't notice, the system is silent and you don't know when it works or not. Second, when you notice, it's because it's been offline for quite a while, and the house cooled off - reheating it will take about the same time. Third, relighting it wasn't easy. Like all the systems with a pilot light, this one also needed the manual override until the sensor (probably a metal rod which should expand in length by heating and thus keep the valve open) is warm enough, which took some time for this heater. The spring against which you had to hold was rather stiff, and I'd have to do it with cold fingers, at freezing temperatures, in a drafty place - the windows and doors on the basement and the garage were just openings with nothing in them.
Actually there was the fourth problem, during the installation. Each time Vlasta would have to go through the garage, I had to step on Popa's chain, because it would go completely bonkers, barking frenetically at him. Which it never did to anybody else, but reacted to Vlasta like that each time.
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* that board later became the top of the workbench for the wood grinder, which we used for a while and then didn't. It ended, for now, as the working table in our bedroom, with the grinder hanging under it for decoration.