And also, something I didn’t mention - mostly because it ended up just being silly and inconsequential… At the very start, I started up The Bat to kick off my attempt… and my Kickr trainer wasn’t connecting. I disconnected it, tried to reconnect… nothing. NOT how I wanted to start my attempt. I checked the plug in the back, it was fine. I checked my power strip, it was on (I knew that because my fan was running which was also plugged into it). I was about to be really upset that my Kickr decided today of all days to be cranky. Then I checked the power block and saw that the plug wasn’t fully seated. So, I pushed it in and boom it connected and everything was fine. LOL.
But, seriously, I have no idea how the plugs come apart while I’m not using them. I neatly set them tucked in under the flywheel so no one steps on them in the garage while it’s not in use. It’s like how hangers get tangled in the closet. Or how headphones get tangled even when you wind them up really neatly. 
While riding I have 4 things connected using bluetooth.
- My Kickr Core
- Wahoo Cadence Sensor
- TICKR chest strap
- bluetooth headphones
Most days I just connect everything to my iphone. But on bigger or longer days I’ll connect to my PC so I can use my phone for other things. When connected to my iphone, the Kickr Core drops it’s connection about once every 45 minutes or so for about 5 seconds and then reconnects. Some days it stays connected the whole time, but some times it drops and reconnects once or twice.
If I’m using my laptop instead, the Kickr drops out a lot more unless I turn off bluetooth on my iphone. Then it stays connected pretty solidly, but still may drop out randomly once every couple hours. I think I only remember my Kickr disconnecting during my KOS attempt maybe 2 or 3 times total.
I’ve never really had HR sensor problems before. I think once or twice I’ve had to remove and re-add it to the app. But it’s usually pretty solid. It’s the cadence sensor that seems to have the most drop-out problems. And many times even when it is connected, I can’t use it because the icon in the settings doesn’t show until 5-10 minutes into the workout and I’ve long since decided to ignore it. It has a pretty new battery since I replaced it maybe 2 months ago.
Anyway… despite all the sensor issues, once i was 5-10 minutes into each workout I was able to completely forget about the sensors and really just enjoy each workout. Well, except for the first half of Butter. lol.
But yeah, that was a big momentum shift between Fight Club and The Wretched. Fight Club had just enough recovery in it, so at 75% I felt GREAT. Despite it being workout number 5, I was doing all TT efforts in my aero bars, I was hitting all the cadences and nailing every one of the 28 attacks. The first sign of fatigue began to show up in the last set when I could feel myself tiring and not quite hitting the cadences as easily. But, that was normal for each video. However, once I got part way into The Wretched and there were no real recoveries, that’s when I started to get tired. And I think that’s when my knee problems began. And then when I did the max efforts in The Trick, I think forgot all about my form and was all over the place (I must look hilarious while riding those efforts) and I think that’s really what did my knees in.
I think my only regret is that I wasn’t able to finish all 12 workouts. lol. I forgot how much I love doing Do As You’re Told. And then I was going to finish up with GOAT which is another of my favorites. And how great of a story would it have been to say I did 12 instead of 10! Much cooler than saying my pc crashed in the middle workout 11. 
@Holger1980 I’m glad the spreadsheet idea helped! 
I forgot to mention that I had my own spreadsheet printed out next to me on my bike. I’m glad I did, otherwise I would totally have forgotten what order I had my workouts in. I wrote down my workout intensity next to each one. And then I would compare my expected start and stop times and then plan to see how I could get less rest in between efforts to catch back up to my expected 5 minute rest schedule.
Ohhhh… and that reminds me. lol!! Maybe TMI, but my “Tom Dumoulin moment” made me laugh - mostly because of the Tom Dumoulin reference. I’ll obscure this, even tho it’s not graphic at all. hehe
My wife and kids made me 3 pb & j sandwiches and gave them to me after The Wretched (#6). Those were some of the best snacks I had all day. I ate one then and another after The Trick (#7). Then… some time during Thin Air (#8)… my stomach started to hurt a bit. That made me nervous. I hoped I could get through all 10 without having to make an emergency break. During The Omnium (#9) my legs felt good (i as able to ignore my knee), but my tummy was still feeling iffy. I was trying to decide what to do. I made up my mind at the end of The Omnium I needed to use the bathroom. I ran inside the house quickly and pulled off my jersey and bib shorts. I laughed to myself as I called it my Tom Dumoulin moment. I wasn’t quite as quick as Tom, but I still made it in and out in less than 5 minutes. And at least I had a real bathroom instead of a grassy field. lol!