Think you mostly had these answered... But just to add a few bits.
1. (a) CA is notoriously bad at getting in 'sync'. Best advice is to have a strong signal to your Wifi from your handset, while it also being on the 'same network' as your trainer (so no CA over mobile data). I actually have a hotspot around 8" from my handset... Plugged into a mini switch that the AppleTV is plugged into, then have a long shielded cable to my home router. I did try extending 'properly' but found that almost as unreliable as a poor Wifi signal so now run my extended as a totally different Wifi network. I've found that really the most stable and reliable for CA.
(b) Quadlock
(c) I've been running the same old sammy 38" panel for at least 8 years. It must be 15+ years old now and was a standard TV in it's time... Bit of a PITA due to the weight so couldn't mount it floating and have to use a desk but as it's so old really no point changing it until it dies!
I actually started on an old reconditioned 'gaming' laptop. It got so slow replaced it mid-covid with a '4K Apple TV' as it was £95 and far cheaper than buying a GPU to put into a gaming rig (an old gen2 i7). Since then have cobbled parts together for a budget rig, just haven't quite got it working well enough to switch back to PC. AppleTV even with it's 'quirks' and problems (remote) is still a very good cheap option and works very well (and I'm no Apple fanboy).
Probably more likely bottom bracket or drivetrain than a 'new' trainer. You could reach out to Wahoo - they're one of the best support in the business and it should have 2 years warranty on it against faults, even without you being the original owner.
Good deal for that, especially considering the costs of couriering it.
For my Neo the courier costs where more than the repair(s). £30-40 each time and it went back twice!
Looks fantastic mate! Is that just base Source stuff and none of the extra plugins?That was my first thought. Hit 'Coffee stop' and jump off to plug it in, but the option was greyed out. Maybe too close to the end? (I hadn't used it already)
**EDIT** Oh and I think someone had shown an interest in Sauce4Zwift. This is what mine is looking like at the moment. The profile is a little over exaggerated for a relatively flat ride, but it's still very handy.
I tab every drink and hardly ever cramp now. But also quite a lot of it is conditioning. Try some basic 'hydration' ones (I like High5 as they're cheap and got lots of different flavours).
Stretching and mobility exercises generally best for calves, combine with ankles to keep things smooth and as free as possible. Any core exercise will help you in the saddle to support yourself - the better your core the more 'base' you have for power transfer, but also the less you'll fatigue when riding for longer.
KOPS (Knee Over Pedal Spindle) is relatively easy to do yourself (especially with a trainer), but also saddle height - which is a bit more tricky, but video yourself from the side. The old 'heel on pedal at 6 o'clock' is a good starting point, then use KOPS for saddle fore/aft. Fit all that without taking the bars/drop into consideration and then as you're on the turbo, position those for comfort over time, not your riding position. Tweak as you go and get more flexible.
