Roll XdY + user entered modifier, and compare total to a number?

I found part of an answer to this question, but it didn't quite hit what I was looking for. I'd like to roll a set of dice (can be any XdY, but in this case, it would be either 2d6 or 3d6) plus a user-entered modifier to the roll, and then have the total of that roll compared to a target number for success. E.g., 2d6 + Modifier, looking for a total of 9 or higher. I know I can do the 2d6 part like this: /r {2d6, 0d0} >8 (I confess I don't understand from the documentation what the 0d0 is needed for, but I know it works).  However, is there a way to add a modifier prompt to that setup? If not, it's not that big a deal. But I can't figure out if it's possible -- all my attempts have failed.

Yes, you can simply add a roll query to the 2d6 side: /r {0d0,2d6+?{Modifier|0}}>10 As a note, the 0d0 is needed because if one section of the group roll has a roll, then all sections must have a roll.

Aha! I was just thinking to try something close to that, but not quite it. Thanks!