Tell us about yourself!
My theory for the non-linearity is this:The bottom bottle is filling as the top bottom empties - this is the equivalent of raising the ground voltage, thus reducing the potential difference of V as time progresses.To confirm this simply remove the bottom bottle and let the water flow straight onto the ground, do this while re-timing and you should see a difference.
Great bench, but I think $1500 is way out of ballpark for 99% of people (myself included). It's not really logical to call that amount "Entry Level". $500 would be a stretch for most beginners.Very nice work though and the Kreg blue makes it pop!
Torch Soldering & Going Further
The only thing different I would suggest is making the anvil out of aluminum, then turning it black using a small pot of chemical blackening solution that is used on aluminum guns/gun-parts (available online at any gunsmith supply or local gun shop). That way you can carefully use wire wool to buff away the blackened surface (in spots that would be worn) and reveal the silver metal underneath.Nice work though. I'd like to see the rest of your collection.
Making Leather Patterns