OK, here's deal. Over the last 5 months I have purchased several modded engines from multiple company's(think Murman, HES, Power ....). By far, Neal's engines take second to no one.
A properly tuned engine requires some patience and time (and the right glow plug). Neal's engines have a certain uuuuumphh to them that no other modification company has. Hell, even Murman engines don't sing like Neal's (seriously!).
This is a unsolicited endorsement for Neal's excellent work. Clock Work Engines are the TRUTH
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Time to get serious people.........