So I decided to fork your repo and implement the second MCP3008 on SPI support (check it out). The mod literally takes 2 lines of code to work. Feel free to use the code in your next release if you want.
The 3 changes I made are as follows (all in HWcontrol.py):
line 63: added "SPI2" to GPIOPLUSLIST
line 915: uncommented PIN=msgarray[1]
line 962: added an if statement to run spi.open(0,1) if PIN == "SPI2"
Tested it with my 2 MCP3008s and it seems to work great!