GRJ is correct. New 555 design is working on a breadboard, but untested in actual service. I'm waiting on some PCBs to actually test it with a DCS-RC on my layout. With nothing unexpected happening, should have something ready in the next week or two.
The plan is to offer complete kits that will need assembly (soldering) and also a fully assembled unit that needs no soldering, fully PnP (thanks to the 'push-fit' pin header that GRJ found).