I am glad it works for you but I am not comfortable or confident doing this, unless i have a really firm grasp on the technology and that is the exception rathe

I am glad it works for you but I am not comfortable or confident doing this, unless i have a really firm grasp on the technology and that is the exception rather than the norm, these days. Estimations tend to be driven by customer expectations rather than technical limitations. If i estimate too high I look bad. Even if that is based on previous experience. If i don't deliver in the hoped-for-timeframe i might get fired. catch-22. Much better to not do it at all, if the business allows it (if it doesn't then it's still important to make keep hammering on estimation psychology ).