I've read conflicting things over the years about the TG-CD add-on. Some have said it is more heavy duty than the Duo, others say they're both on the same level.
I'm limited in my exposure to the TG-CD. I've only toyed around with one. Mine worked well for a while, then began to have very long load times.
My Duo I've owned since it was new. I've had no issues with it with other games. I've even put it through some extra long playing times when I first purchased Exile some time ago (Beat the game in one sitting).
Vestcoat, Meteor blaster is the first game to refuse to work for me. I place the disc in there, it searches for a period of time, then reads "please check disc" or whatever the message is when you put the wrong type of media into a Duo.
I don't fool around with other, ummmmmm, bootle.... no, "back-ups". So I have no idea if it is the CD-R brand, or just CD-R's in general.
Could be the brand, as I have encountered issues with certain cheap DVD-R's.
Hoping this new homebrew game is on an actual CD!
So, what qaurter does it look like the release will happen?