I think the first video from the UK had people thinking this was the ultimate engine. Well I think the guys are looking for DA numbers at a cheaper price. Tomy and Scott at Brillelli both had the same idea, there's no reason to limit yourself to 50cc. The thing guys want is a sub 4 pound motor that puts out 5 1/2 HP, who cares if it's a 45, 50, 53, 57, 60, or for that matter a 80cc. Make as much or a little more power than a DA50, which is the benchmark, have good customer service, Brillelli and DA are the benchmarks, at a good price. The benchmark for the price is a tough one, is it DA @ ~$750 ready to run, or is it DL which is ~$500 with a good muffler, tough to say. I've not seen one with a good MUFFLER from the manufacture, Brillelli's is the best built, but to call it a muffler is a stretch. Tomy is trying to supply headers and canisters for his engines, which I think is a move in the right direction.