It can happen to any machine, but it happens a lot more with these machines, than any SSL I can think of. Those engines are expensive, and cost way more than the value of the machine. The fact that it doesn't get many hours makes it even worse in my mind. If the engine lets go, your just going to have to eat the cost or junk it. Its not like it makes any real money like it would if you were using it commercially. I would rather spend more money on something else up front that doesn't have the history these engines did, then roll the dice and lose. The money spent on putting it back together could have been spent on a much better machine initially.