Well I just thought about this. You don't ferment in something you can see through do you? Were it mine I'd wait until the active fermentation was done. No swirling, no hops in trub in suspension and yeast starting to fall. But I can see that through glass. It's tough to say in your situation but I guess if I were you I would want to know the expected FG and rack 0.004 points away from it or so and top off with pressurized CO2 if necessary. Is using bottled CO2 considered bad according to LODO lore? IOW, is there thought to be a tiny amount of O2 in the CO2?
I cannot see through my fermentor. I doubt I could reliably predict when I'm that close to FG since I can't really say what FG I'm going to hit anyway and then the timing on that would be pretty though. I don't think there is anything wrong with force carbing in terms of O2 pickup. I have heard that natural carbonation is different but I can't say for sure. I can't see why. might make a cool triangle test that I could do sometime since I have these spunding valves.
I guess I had a few goals here.
1) try something new
2) see if I can get the beer carbed and ready a little bit faster
3) see if I think a naturally carbonated beer seems better to me
4) see if this avoids O2 pickup and makes for better beer
but if this seems like too much of a PITA it is likely to get abandoned. if I don't have a way to avoid serious amounts of hops, yeast and trub that could kill it right out of the gate.