Hi Reinard,
Thanks for taking the time to answer.
I searched for the support section and could only find this form
http://www.typematrix.com/support/contact.php so I guess that's the correct way to contact the support. I have tried at least 3 times to contact them and didn't get any answer. I tried my luck here in the end, but as you can see it wasn't a success either.
I do love the TypeMatrix keyboards, but I'd rather trust my own experience than an eventual answer arriving 2 month after my first attempt at contacting the customer service.
Anyway I've been thinking in building my own keyboard, I think that will be the next step :)
Best regards