I'm a big fan of "fix it and make it right." Otherwise, I'm never happy with the result, and who wants to fly a plane that always reminds you you screwed up? Once you fix it, however, you can look at it and say "sure I made a mistake, but it is fixed right!"
You can purchase another L/O guide or make your own, depending on your tools available. You can make all of the pieces out of 1/8" birch plywood. A couple of brass eyelets in the slider would be nice. You should be able to steal the slider and hardware out of the one you already have, although it may take one clean slice to get it out?
On the subject or switching back and forth on your flight direction, it is my opinion that only a few would ever get good at this. The rest will crash. Repeatedly. I have been gifted wrecks by guys that thought they could only to find out there is no time to think and push back the long-ingrained training and muscle memory. My thought: pick one way and stick with it. I see no advantage whether right or left handed in the direction of travel. Except in racing, when being a lefty makes flying for everyone in the circle a lot harder. Unless they are all Leftys.
The Divot