Thank you for all of these responses! To clarify, I’ve been riding this horse almost a year now, so he’s not super new to me. The first few months I mostly spent getting back into riding shape after having not ridden in five years, and having not ridden consistently in much longer than that. We showed Third this summer successfully and I’ve trained 4th/PSG before, but that was about 15 years ago so it’s been a lot of shaking off the dust and getting my position and feel back. These last few months it’s come together much better, which is why I’m considering going for the silver. We plan on just doing Fourth Test 1 twice and then the PSG twice - like I said, I don’t want to show the hell out of him, just plan on getting the scores and being confident enough that we’ll get the 60+ when we try. We can do a Fourth Test 1 now, but I want to get smoother.
Thinking about all of this, and after carefully thinking through my rides this weekend, I’ve realized all I really need to do is really focus on basics and getting through with my half-halts/suppling him. He can be really strong and run through the reins. I’ve decided I want to just keep riding him in the snaffle anyway, since I want my hands to be super independent and soft. It’s more challenging this way, but when I DO get my half-halts really through and get him off my hands, off my legs, onto my seat, then all of the movements seem fine. He does canter pirouettes and changes really well, luckily. For a while it was a challenge to NOT have him to tempis - if I’m not super careful about my weight distribution and legs he’ll just do changes all over the place. Schoolmasters are the best.
So today I just basically worked on serpentines, trot-halts, trot-walks, some shoulder-in, just really focusing on getting him even feeling on both reins, being able to bring him back and forward but staying light. At the very end when he was feeling much more with me, I did a couple single changes that felt really nice and expressive, then tried a line a of threes - and it was the first time I’ve done a perfect line of three tempis. I was so happy and it proved my theory - that if I’m really “with” him, then the actual movements are not hard. As you’ve all mentioned, this is about me figuring out how to ride him, not him needing to drill the moves.
Edited to add - we only do piaffe steps occasionally with my coach - it helps me get the feeling of getting him really working off the back end and lifting himself, instead of hollowing and rushing through transitions. He also gets very fancy farrier work - his feet are his only real issue these days (but I appreciate all this advice on preserving his mileage as best I can). We do long warm-ups and cool downs and use ice boots a lot.