1. I determined early on that I wanted to minimize hardware and leverage some control from automation. This certainly isn't at the level of full automation of many high-end builds on this forum, but I wanted something at reasonable cost/size. I realized I could eliminate the HLT and just use the RIMS tube for heating strike and sparge water. This allowed for a smaller footprint and an off-the-shelf stand. I live in FL, where a basement brewery is not possible, so this was built to reside in my garage. I wanted this to be portable, so a cart design was selected. Luckily my electric panel is in my garage, so I installed a 50A outlet to power this (justified by potential for electric car charging in the future). The kettles are cheap Bayous. The MLT has a Norcal false bottom and a Loc Line sparge ring. The BK has a ripple element, a BrewPi element enclosure, and whirlpool arm, a DIY trub dam, and a borosilicate sight glass.
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2. As mentioned, I wanted to have a good controller. I researched many different homegrown options, initially planning on using a USB data acquisition board and writing my own interface, but ultimately decided I couldn't pump the time into it, and an off the shelf option would fit the bill. The BCS is a solid device at low cost, and the support is reasonable. The biggest problem is the NTC thermistors it uses (not RTD's which are more accurate and more common of most PIDs). I did not like the hardware probes that BCS offered, so I ordered Auber's probes for the RIMS TC end cap, the BK, and the MLT and chiller ports, and I replaced the RTD's inside with high quality thermistors.
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