The safe zone is great and well organised, albeit a bit odd with all the other groups around, which made it feel a tad insecure. I didn't find the site itself to be particularly amazing; it was decent, but no more than that.
Even putting aside the technical issues and the injury, that sounds like a pretty poor day. I have only been to Driver Wood once and haven't felt inspired to go there again. The reports on here don't inspire confidence.
That would explain it; however, when it means that players get a poor experience, that is inexcusable. I know that marshalling can be difficult; I have marshalled at two sites and been offered marshalling gigs at two others. However, there is no excuse for marshals not knowing the game rules.
If the rear sight can easily be reattached, why haven't you done so?
Yours seems to be for sale on Used Airsoft for £60.
https://www.usedairsoft.co.uk/rif-s/electric-powered/tokyo-marui-sig-sg551_i94655
I have fitted an M4 style unit and am very impressed; it is more consistent than the ZCI one. I am currently fitting Perun Hybrids to all of the Lad's rifles and am hoping that he will agree to me fitting an AK unit in at least one of them.