Question about Zero Point SDX filter section schematic

[CheapChip]

Hi there!

I would like to modify a Sea Urchin delay to adapt the SZSDX "analog" and "tape" filter section on a self-etched board.
But there's something I don't understand: what is the "VR" supply point on the schematic? Power of the tl074 is supplied by the closest "+9v" point, right?

Thanks!

[juansolo]

GNDN (goes nowhere, does nothing). Always ignored it I've tacked the Analog filters onto the ZPDD myself with great results (http://www.madbeanpedals.com/forum/index.php?topic=18683.msg179888#msg179888). Definitely worth doing.

[CheapChip]

OK, that's what I thought, but I wanted to be sure before I make any board: don't have any other way to verify it works... 

Thanks Juan! As you said, I'm sure these filters are great ! ;-)