Houston, we have a problem...
Front Panel: Opening Too Large
This is the physical problem. The InkBird controller is much smaller than the LKTC-B1-T. I'll solve this with a faceplate clamped with screws to the front panel for testing. I may or may not make a new bottom piece for the case at a later date.
Another problem lies with the temperature control. I'm almost certain that I'll also have it with the Inkbird. The problem is with temperature overshoots. The mass of the heater is much greater than the mass of the beaker and its contents. The heater gets much hotter than the beaker, and this is transferred to the rosin when the heater is turned off. The smaller the volume of the beaker, and what's in it, the worse the problem gets. My small 50ml beaker had an overshoot of 30°C with 11ml rosin and oil in it. The set temperature was 50°C.
To get around this problem, I'll use an oil bath of 300-500ml for the beakers. The added volume should stabilize the temperatures. Note that the volumes I work with will be from about 10ml for 30 capsules to 160 ml for 400 capsules. This magnetic stirrer / hot plate is designed for use up to 1000ml. We'll see how that works out.
The second problem is the reason I'm not investing the time to redesign, and rebuild the case yet. I just want to test everything before I go that far.
Well, the problem is bigger than I initially thought. The faceplate idea will not work as the motor for the stirrer is behind the hole for the temperature controller. The InkBird extends too far into the case. OK, since I need to build a new bottom, front and back for it since this is a single piece of sheet metal, I may as well go all in. I'll use the current power switch for main power to turn on the temperature controller and enable two new switches.
The first will turn on the electronics for the stirring motor.
The second will be between the SSR and heating element so the heat function can be disabled.
First Acceptable Parts Placement