Thank you OldBones! It's funny I didn't do a ton of planning when I built it to be honest. I actually went through several drafts before finally finding a layout I was completely happy with. And detailing the ride was a challenge, but I'm happy with how it turned out.
When filming with cheat engine whether you're filming with 30fps or 60fps, there shouldn't be any frame loss. By filming in slow motion at x0.25 speed you make a lot more frames than normal, so when you speed it up x4.0 there shouldn't be any lag. It's a technique I learned by watching some Planet Coaster tutorials.
As for sound lining up with the sped up footage, I generally will make scenery, tracks, rides, ect invisible either in the LOD options or with the toggles. I usually turn off all anti aliasing and shadows anything that will slow the game down. Then I just record at normal speed, and everything generally will run smooth enough to line up. Then you just line it up in post.
Also you can place speakers around during this step (this will let you use music and sound effects in specific spots). Speakers won't be seen since this step is only going to be used for sound. I usually don't do it all in one pass but that's just personal preference. I usually do one pass for track sounds, one pass for on ride music or park music ambiance, and lastly one pass for any extra sounds that I want to fade in and out seamlessly (such as rushing water, waterfalls, flat ride sounds.) I've subbed out some of the flat ride sounds for PlanCo sounds or sounds from footage of rides on YouTube.
That being said I do add a lot of sound directly in post beyond these steps, as there are limits to this technique. For example, the lift sounds and brake sounds aren't in game, even with my sound replacements by FranceCoaster. Also I usually add my day and night ambiance directly in post.
I've been intending to make a tutorial on video and sound editing, it's just finding time to do it that is hard. I am going to start a new tutorial series soon starting with B&M layouts. I figured those are probably one of the more popular coaster types in RCT3. I'll probably do other layouts after doing a supports tutorial. So I'll have to work in sound and video editing somewhere lol.