[billr]

There are many inexpensive (< $50) was to get OBD2 live-data via a laptop/phone/tablet. The key search phrase is "ELM327".

Even without any kind of live-data, you should be able to detect gross slippage if you try to stall the engine like I described; just by listening to engine rpm. also, of course, the air-checks require no live-data.

PS: I meant to ask... what in the world is that "tick-tock" I hear in the video? It reminds me of the crocodile trailing after Peter Pan!