I am coming across a form which contains around 3000+ fields of data. Its basically a long grid-like matrix that needs to be filled. While form coding is a separate (and painful?!) issue, I just want to know what is the max limit of fields that can be supported by ODK Central + associated database? I remember MySQL gets a huge hit on performance after a certain number of columns (I think 4096). Just wondering if I can expect some issues in ODK for this?