Welcome Eric, glad to have you aboard. There are a few ways to find leaks. One is to watch the loop where a lateral line joins the mainline, if the flow is fast, you have a leak, walk that line, check each tree for fast moving. It may be best to start that line at the far end, fix the first drop where you find a fast flow, then continue towards the mainline repeating as you go. Another way if to have a vacuum gauge on each mainline and a ball valve. Close the valve, if the vacuum drops quickly, you have a leak to hunt down, if the vacuum drops slow and steady, no leak. Another way is to just listen carefully as you walk the woods, if your hearing is still good, you can hear the leaks, if bad look into a Leak Detector (I think I got it from CDL) That is a set of head phones and a battery powered amplifier, with it you will be able to tune in to hear even the tiniest leaks, even ones next to a running vacuum pump. That is how I hear them, my brother in law can still hear them without the leak detector
even though he was a mechanic his whole life and runs a chainsaw a lot.
As far as ROI, that happens when you get out of maple and sell all of the equipment. By the way, I have a whole list of stuff for sale in the classifieds.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.