I tried to read trough the whole thread, but it did not spot why did you choose to use this particular keyboard?
The reasons for this are repeated a lot of times in this thread! But -again- a quick recap: availability of both the keyboard and domesheet and ease of construction. A lot of suggestions resulted in keyboards that were not even for sale. Also, the way the a855 kb is made will result in a very simple and strong part.
This has been stated before, but again: 1. domesheet is not available 2. makes construction more complex and thus weaker. As stated before, the key in building a successful qwerty-oh is using of-the-shelf products!
There are many better keyboards out there.
For me swapping from Motorola Droid 4 keyboard to this would feel a big disappointment & regression.