Sweet, I love nograb booms! I'm practising on nograb booms now, but I can't get enough momentum without grab yet.
Gunshy: It's also a lot of luck. With my first boom replay (3dm's), the first edit didn't yield a single dm. Then I edited like one join and got the full boom. It's more about positioning than timing. I have also once got a decap with a speed of 10 on the speedometer.