They won't be coming back in this form. I can't get good quality HC-05 BlueTooth modules anymore (the supplier I had before vanished) and the stuff I have received last few times was crap, to say the least. Once I'm done with the app release, I will be re-designing the kit to use the new 32-bit processor. It will probably come as a partially assembled board (ESP32 will be programmed and installed), but the input stage will be "DIY" (i.e. configurable for a particular setup. At this point the firmware is actually "universal" (the code that ships on pre-made iGaging and Shahe adapters can read glass scales as well as the native glass scale code.
Regards
Yuriy