[IDEA] Is there any way you guys could add .xlsx to the list of allowed formats?

I had a really cool statistical analysis of champion base stats that I wanted to post up for feedback before I start running DPS calculations with it, but these forums don't accept .xlsx attachments. I would post it on GD, but I find that on GD the amount of attention a post gets is not at all correlated with the amount of work that went into it.

I tried uploading the file to my Google Drive, but it broke a few of my statistical metrics and ruined all of my conditional formatting, which was the only reason my spreadsheet could be analyzed without eye bleach. You can't actually find the data you want without it when you've got 120 champions (and some multi-form champions who gain stats)+five number summary+some extras in the rows and different measurements all the way to column AT.

Could you potentially add support for .xlsx attachments? And until you do, does anyone have any ideas for workarounds to allow me to show off this sheet?