My cloned SGC also arrived recently!
Nicely packaged and beautifully built, though no enclosed instructions - not a problem here.
Booting-up on an Iss6 QL running Minerva 1.98 (with Marcel's 'Serial IO fix') however failed for me stating that the ROM was unrecognised - and I know why - nothing to do with the SGC itself...
To differentiate my various EPROMs (I have 4 QLs now - don't ask...), I adjusted the Minerva version string from "1.98" to "1b98" before burning that EPROM.
IIRC, the SGC ROM checks the ROM version before then patching its fast RAM copy - but of course can only patch against known version IDs...
Silly me! I'll re-burn a fresh EPROM without tweaking the version ID and try again.
But it did get me wondering about ROM compatibility with SGC - namely, even with the Minerva version ID set to something SGC will actually recognise, might we hit problems with say, Marcel's IO Fixed version, due to byte-offsets changing (one additional instruction, in that case)?
I'll need to review the SGC ROM patching code to know how sensitive it will be to small ROM changes/fixes.
Thank you Tetroid (and of course the original team at Miracle)! Absolutely none of the above reflects badly on your SGC clone - just on my 'tweaked' setup