Thats the key to deadlifting is getting the groove, and practice it 'til perfect. Friend of mine is a thin 150 lb. lifter.
All he does year long, is practice his deadlift form, with very light weight. Never goes above 225, and normally uses even lighter than that. Last month before a contest he'll add weight.
Pulls around 300 lbs over his body-weight (450) is Natty, and 50 years old. Never injured and just enjoys training like that.