He claimed the screw was threadlocked, not glued. In my experience, threadlock is blue and super glue is clear/white. The same "substance" is also holding the handguard to the barrel, and I'm 99.99% sure threadlock can't hold wood to a steel barrel?
He also claimed if I'd of messaged him he would have refunded me and there was no need to drill it out, and that by drilling it out (To assess the sheer state the gearbox was in, which as I expected was full of metal shavings that needed to be removed) the replica is no longer in the same condition as when I received it, which I found rather humorous because it's now actually working unlike when I received it from him 😅
I've spoken to the tech at my local shop who has agreed to take a second look at it and see if we can salvage it somewhat as the gearbox/motor/Hop unit is actually functioning and it's just the selectors that are now faulty, he suggested possibly semi locking it and having the selector switch act as a "dummy" - So there's a ray of hope, but it's definitely soured my trust in purchasing pre-owned replicas. I've bought countless pews from here and never faced issues before though.