Assembling the Gas Sensor

Finally assembled the gas sensor board, well sort of.
Here is a vlog esque of myself assembling the gas sensor board and of course, I had made some errors...
The board itself comprised of roughly 45 - 50 components, and took around 3 hours to complete from placing the perf boards to removing off the hot plate. Of course this being my first time, I would imagine with practice you would get faster.
Some tips :
Name each component bag with the appropriate designators and check off the BoM.
Get a microscope.
Make sure you buy a hotplate and not a pre heat plate, or at least something that can go up to temperature to reflow!
0402 capacitors are a pain to place without microscope.
The stencil will have plastic both ends.