Qimage uses LibRaw so any questions about whether or not specific models can be "hacked" should be directed to LibRaw:

https://www.libraw.org/

LibRaw supports many hundreds of camera models but on models where manufacturers (like Canon) invent new formats and don't publish specs, a lot of times you'll find that only the uncompressed raws will be supported.  At that point it's a tradeoff: if you want the convenience of compatibility you might have to sacrifice some disk space in order to do that.

As for the purge sheets/unclog, that's part of Qimage so there aren't any utilities that do only that or specialize in sending to printers via command line.

Honestly, I wouldn't buy Qimage just for the unclog tool because you'll be losing so much in the printing department: you should be using Qimage to print every print you send to a printer.  If you aren't, you are getting inferior prints.  Period!

Regards,
Mike