Luke's last video is of him installing an Eshooter Kestrel electronic trigger unit. It didn't go smoothly.
Normally I'd take that as a sensible warning to stick with the Peruns if I ever feel so bold, and leave it at that.
But... another video popped up on my feed, from someone who was doing a sponsored review (so can be taken with several shovels of salt). However this chap pointed out a bunch of things in the instructions, followed them, avoided the pitfalls Luke had fallen into, and came out with a working gun at the other end of it.
Of course any 'dramas' would have gone missing in the edit, I'm sure, but still the fact Luke's more gung-ho "I know this stuff, I'll chuck it in" approach might have meant he'd had more problems than he needed to.
(I'd still stick with a Perun over the Kestrel, naturally)
As for working on fixing one of my many broken / partly malfunctioning guns - I suspect I wouldn't actually use him as
(1) he has a famously long waiting list to get stuff done
(2) he'd absolutely rip the piss out of me on camera for my attempted fixes etc and I couldn't cope with the embarrassment
I'd entirely trust him to keep working on a gun until it operates properly though.