Well, I was gonna post another pic or two but can't seem to figure out how. Suggestions for that too?

That is beautiful Cameron!!! I'm going to try this here with my beds!! I'm not looking for a perfect edge either, I'm rural as well on 15 acres and taking in land as I put in landscaping. The actual "lawn" area is small (I only had about 50 to 75 feet from the house cleared), I prefer plants and trees to grass to mow. Not to mention all the money I will save and can spend on plants by not buying a bunch of stone or brick to put in for borders!! :-) Hubby LOVES the idea of being able to run the mower right up to the edge of the bed for help with the maintenance. John, how well I know what a pain the weeding is around borders. On my last house (subdivision) I found some absolutely beautiful terra cotta border. I've never found it again, but my fescue crept right into the beds. And I made a beginners mistake of putting in Mint in my herb area. Controlling that was a constant battle!! Where I have the brick now is exactly where I wanted it. I didn't have any sidewalks put in either, I hate concrete poured sidewalks. So I'm putting in one very functional red brick sidewalk to the door we use the most. These beds with the brick border line that sidewalk and give the definition I need to the walk. I want to use stepping stones for the other walkways. Now, what kind of shorter plants would look good at the edge of the beds? That is and do well in full sun? LOL my last house had a lot of shade too, and I'm learning full sun plants now. I'm going to look into some of the mini lillies!

I wouldn't screw the inside corner together. If it looks to you like it may not hold, then use nails through the stakes into the form, leaving part of the head exposed for easy removal after pouring. Nails are priable, screws aren't. You can use a nail to hold the outside corner pieces together. If you put a level on the existing border, is it level on its own or does it have the same slope as the driveway? If I were starting from scratch, I'd probably make it parallel/level with the driveway, just for ease of the outside form. But if the existing border is level on its own (not parallel with the driveway), then you're stuck with that on the extension. Not a big deal on the inside form, but it makes the outside form tricky. I suppose if you just use a full 2x4 on the outside, which would stick up above where you want the new border, you could trowel the concrete level with the inside form. I've never done it that way, but it seems like it would work. Since your outside form isn't secured to anything like stakes, consider putting some block on top of them, to hold them down, as well as in. I've never oiled form boards. To remove them, stick a wonderbar in between the concrete and wood and gently pry them apart. The concrete won't be fully cured, so subject to chipping if you just beat on it. On the inside forms, if you take out the long board first, that will make the short board not be wedged in, as it'll have the 1.5" that the long board took up. You could pry against the fence to shift it that way and loosen it. And you could dig out the dirt to make it easier to pry off.

It would definitely be trouble to have two groundcovers (they usually spread sideways ... ivy does for sure) abutting one another in the same bed. How would you keep them apart? (That looks like English ivy in the picture. Algerian ivy is similar, but is a more robust, more drought resistant plant as I understand it. @longbranchstitch ... " I’m curious about the ivy comment. We live in the PNW where we battle ivy all the time ... I personally would never set out to plant it." You can't identify any use that it would serve ... covering and smoothing over rough ground? ... erosion control? ...growing where no other plants will? ....low cost per square foot of cover? ...evergreen for all-season use? Those are some of the reasons a person might want it. If none of those reasons work for you, why don't you get a serious program going that includes IVY KILLER, and get rid of it? If it's somewhat useful and you don't want to get rid of it all, why don't you consider learning to manage it? For example you complain that it grows up trees. It takes literally one minute per year to severe all the ivy growing up a single tree trunk. If you have 180 trees, that's three hours per year to solve that problem! How much time would it take to mow a lawn on which 180 trees would fit? ... maybe 50 times that amount of time and it would require an expensive machine! So the trade-off for ivy seems possibly favorable on that count. Anyway, you can evaluate whether it could be useful to you, or not, and then either get rid of it or get it under control.