smmrfld, how many non- 0 digits do you have? That will tell how many 0's you need. I have 10 non- 0 digits and I think I have 4 leading 0's. All RR numbers have the same number of total digits including the 0's and I think that number is 14, but I may have 5 and that would make it 15.

Edit: I just checked my Choice profile and it is in fact 14 total digits.