Hi Steve, I'm a big fan of your designs. I have already printed the SP5, SP6 and SP7 several times. My ATMOS watch, which is more than 40 years old, inspired me to create a PLA ATMOS design based on your SP6. Unfortunately, for the frame you need a printer that prints 260 mm high.
All the best K.J.
PS: An extension with a Real Time Clock RTC DS3231 would be nice.