I'm not an engineer (tho many here are), but how can you be 100% sure these will work when you haven't yet had a chance to try putting Avalon's chips in them? All the other DIY Avalon producers say they are waiting on sample chips to make final adjustments & ensure they hash correctly.
Honestly we are trusting Avalon's design. The manufacturer is established and high quality, so that is not a risk at all. If there is a manufacturer's defect we will rectify the situation.