Make sure you torque enough & use carbon paste.
If it's a tolerance thing, then consider using a soda can shim, or some fiberglass cloth.
Also consider greasing the thread of the plug, especially if you've sweated on it. The torque shouldn't go into turning the screw, the torque should go into pushing the expander into the seat post.
Afaik, save for crazy exceptions, "all" seatpost slipping is fixable.

my er9 included all imaginable bolt lengths and adaptors for 140 to 160mm discs, something that costs extra and requires significant brain damage on Shimano. I think a very small fraction of the market cares about post mount (at least on the road setups), i wouldn't even want to pay for the shipping cost of bolts of another thread size. Shipping from China is a large portion of the cost of everything we ride in the West. 

I LOVE how they're trolling Factor logo & paint schemes.
The RS1 looks like various workswell / yishun / lightcarbon models, it's for sure OEM.
The SL1 could be a VB 177, bearing in mind VB is a broker, not a factory. It looks similar, but slightly different, for eg, to a long teng 266.
I dont follow gravel much.
Those boutique brands are basically a scam, it's incredible.

While I don't really understand the squared design of the downtube, I can not imagine that an average rider would feel any difference. Especially because I guess the front wheel will make the bigger difference in that area and It should kinda shield parts of the downtube from the air flow.

I think the rider position, clothing, ... will make the biggest difference in aerodynamics.

we know for a fact that rider & clothing matter more than the bike itself, it's about 80% rider and 20% bike, afaik.
That being said, a bus shaped tube is a bus shaped tube. Even without a wind tunnel, we know that tear drop / kamm tail shaped things are more aero than round things, or boxes... And we know that buses aren't aero. You wont find an aero frame with a wide, boxy shape like that, nor will you find a frame that touts its aero prowess with a boxy shape like that - until proven otherwise, ofc. Given it's an ultra light frame, and making frames of that weight at this price point is a new phenomenon, and that LC doesn't make any aero claims, i think it's safe to assume it's not aero. Whether it matters or not is subjective. But even if it "only" costs 5W at 45kmh, i try to spend my money diligently, and given how incredibly hard it is for me to raise my ftp by 5W, if i'm going to buy a frame, and if i can, i'm going to avoid buying one that screams "i'm a bus". It's a guesstimate. It's also an aesthetics consideration, as i dont find that boxy shape appealing.

Clear, thank you!

That's awesome! i did design and print a rear bento box for my propel a couple of years ago. it worked great until it disintegrated in a flat second. My advice: carbon fiber cloth or (cheaper) fiberglass cloth to reinforce everything (or pre preg to make your life easier, presumably). My box failed in the middle at some random layer line, which retrospectively, makes sense. It was more of an experiment than anything, i was phasing out the use of that bike already, so i didn't print a new one and didn't get around ordering cloth.

i like the ghetto TT front end rig a lot, well done!

I think I've made peace with not buying that frame. The down tube is simply too much of a square box in the wind. It can't possibly be fast, and I'm routinely doing 40+kmh on the flat so it matters to my riding. It's been helpful to see people's builds here to confirm that. The real Cannondale is nowhere near as boxy.
I also don't think it is a timeless design. That's subjective, but I feel the rim brake supersix (and first generations discs) is timeless. Along with various other frames. But not that one.
The thin downtube also raises questions a la Canyon. If you throw two bikes in the boot of the car, the last thing I want is a cracked frame in transit.
I thought I'd post because I long and seriously considered buying one.

I think PP offers value mainly on the QC aspect and communication after that it’s up to each individual to decide what is the value of service and if it aligns with PP mark up. The problem is that in a depressed used market or even brand new with 50% off being the rage, the value proposition of chiner built is a lot harder to justify especially once considering resale value.

QC: Panda podium inspects themselves every item they sell? There's no way, right?