This forum looked lonely so I'll just post a kudos to whoever came up with the pizza wheel cutter design. It works great and is a lot easier/cleaner/more reliable than the nichrome wires we've tried in the past. Good job.
We wanted to try some practice flights without the iridium payload, but still wanted to use the new cut down. We found the same motor/cutter can run from an arduino uno's output pins and easily programmed with a preset delay. We've used that arrangements several times now without fail.