I got updates from the electronics assembly as well as the front and back panel manufacturer.
The soldering of the PCBs are starting this week and Grawart (http://grawart.pl/) are working on the first samples of front and back panels for the SFC-5. When the samples are approved they will go on with the whole batch. For the SFC-60 and SFC-Mini, I found 3 different companies : one to cut the metal, another powder coating and then a last one to do screen printing. It was cheap but took so much time to pick up stuff and prepare the material for the next step. Also, most powder coating companies are used to do rough and quick jobs, while front panels need a huge amount of patience and care. I have some panels I cannot use from the SFC-60 and Mini because they are not perfect. I am positive that Grawart can deliver perfection based on what I have seen at Superbooth.
Without any major issues, the controllers should be shipping at the beginning of July.