does their platform work for the latest Bitmain products as well?
Not sure what you mean by platform, if you are talking about the tools then you can browse their website, they have this
tool works for all Bitmain Sha256 miners from T9 all the way to the latest 17 series.
I've used soldering equipment before and have the will do to hot air.
Here is a video tutorial for Antminer S9
https://www.youtube.com/watch?v=5WH7g61d90w&t=246s, fixing other versions will be nearly exactly the same, you will need the same tools, the only difference is that the chips models are different for certain miners, you can find all the tools in the video including the chips on their website or on aliexpress, the general tools can be found at any local shop near you, the chips and the fixture tools are special and only manufactured in China as far as I know.
Looks like I might have to replace a temperature sensor as well?
Nop, you don't have to, the chances of all 4 sensors stop working are slim to nothing, this error happens because of a bad chip, you can refer to this
topic for more details regarding the temp sensors