Ace, I've been thinking more about using an NT harness with a chest ascender or roller for an SRT Ropewalker system, it doesn't seem practical when there are other harnesses more suited to this type of setup.
Sorry I haven't shot a photo of my Tengu harness SRT setup, need someone else to shoot it while I'm rigged up. It is a variation of a Texas System that has some aspects borrowed from a Frog system. I use one ascender and a self-tending split tail attached to the fabric leg strap D (rated for life support) as a back up to the main ascender. The main ascender is tethered to the my saddle delta (a pear screw_link_). I use a Pantin on my right foot and also footlock the tail with my left foot to provide lift. Theoretically a Croll could be attached to the legstrap D but that is far from being a chest ascender

-moss