Just to make it clear: I fucked up with the initial Fusion Indiegogo run.
Didn't plan things correctly, couldn't handle not having enough money and a bunch of angry people at the same time.
Orders were taken care of in the following months though. That was years ago.
In the meantime I set up an ugly page with a waiting list for those who still want to buy new ones:
http://furrtek.free.fr/fusion/
No payment in advance so no mess-up possible. Also only had 1 DOA out of the 75 I built until now.
The one from the Spanish guys (Japangamesonline) is an exact functional clone. The CPLD's (chip which does most of the work) bitstream is a 1:1 copy.
Funny that they bothered dumping the bistream and that they've redrawn the board layout when they could have just used the publicly available files lol.
The only difference with the Fusion is that it has a plastic case and it's sold twice the price.
I also doubt they're testing each one before shipping...
Here's my suggestions if you absolutely need a converter:
If you're on the cheap, not in a hurry, and want a guarantee that all original games will work perfectly (except sometimes MS X, as stated on the page): get mine.
If you want the same thing with a pretty plastic shell for twice the price, with no guarantee at all, or if you're in a hurry: get the Japangamesonline one.
If you're rich and/or don't have an Unibios on your AES already, get one of the latest Magic key.
All converters still being manufactured today have the logic right. Assuming your system is powered correctly, if they're not working, 3 things:
-Manufacturing defect.
-NG: DT MVS games. They need the backup ram so I've been told they won't work on AES.
-Shitty bootlegs/multicarts pushing the limits too far.
Otherwise yeah, there are 1-slot MVS boards for $40 on eBay.