How many Time Head can be used after swaped

Hi Friend.

I will like to know How many times head can be used after taking off.

I try many time with change head. and in My experience sometime I just can use it just one time after that it damage but I ever use head up to 5 times ( with 5 case of recovery with Head problem ) then it crash.

here Got lot of people that are profesional in DR and of course have perform change head many many many time. please tell us the statistic how many time it can be used based on your experience.

Thanks

Aping