I think Zelda is fast enough to get Open, but I don't think she can do Excellent.
I'll say that practice and at trials are rather different. Somehow my dogs would do things at trials that never happens in practice, like they would jumped off dog walk on the way up, run pass dog walk/A frame (they love A frame), jump off teeters on the way up, jump a bar forward and back, knock bars etc etc. I assume it is between a new environment for them and the tension they feel from me and likely me mis-handling
As far as weaves this is how mine went. Zelda did it for almost 2 years doing it only in class (at most once a week) before we deemed her good enough to attend trial. A month before the trial date I finally setup my own weaves at home and do it daily. It really helped her. But the most amazing change is in Link. Before I setup my own weaves he only can weaves with guide wires, and would do absolutely nothing without it (not even partial). However after I setup my own weaves and practice with him daily he was able to weave and attend the next trial along side Zelda in 6 (!!!!) weeks. At this point he can weaves pretty good, but his entry is imperfect. I have to slow him way down before entry. Zelda is pretty solid (except the last video which was very surprising) comparatively, but she's just a slower dog.
I did channel weaves method. I got 2 sets of adjustable weaves poles from Amazon. Setup them up zig zag pretty far apart, put a target plate at the far end and just send hm through the channel. I follow him quietly and toss him a treat around the plate (without him seeing me toss it so he doesn't get used to stopping at the end of the weave to look at me) when he gets there. You can also place a treat there in advanced but I find it hard to keep they from stealing the treat even if they did weave wrong. Once they get the idea keep narrowing down the channel. Eventually it got almost all straight except he'd have problem in a few specific bars (like entry), so I'd just open up tiny bit of that location (everything else still straight) to keep him successful. Eventually he worked through everything. Then I work on actually walking along side him (instead of following quietly at a distance and leave him to do it on his own), then actually running a head of him, and running sideway from the weaves completely and rear crossing behinds the weaves. My instructor's belief is that it is an independent exercise and should not need any guidance beyond entry.
I was extremely surprised how fast Link got it. With only 5-10 practices a day. I never expect he can go to trials so soon.