For the ti bolts, they’re machined (eroded?) a little bit slack and the heads are shallow so you need good tools and a bit of attention to fit them safely. Try and whack them in with a rusty B&Q allen key and you’ll round the bolt and probably end up on here emoraging at Superstar 😉 It’s not good but it’s easily worked with and the prices are still decent.
Superstar in general are a bit erratic in my experience, I’ve had some excellent service and nice touches (frinstance, bought a 4-pack of pads and asked to change one pair to organics to try out, they sent me the organic pack for free, doesn’t cost much but it was nice work). But they handled my seatpost issues badly. It got fixed eventually but it went
1) New dropper seatpost doesn’t work. Contact Superstar
2) They say to service it. Serviced it. Still doesn’t work. Send post back to Superstar
3) They say “You caused the problem when you serviced it but we’ve fixed it now” and send it back, even though the problem was there from new. It still doesn’t work.
4) Finally fixed on second attempt