And to round out this thread, it has arrived. Good service from BBG4L, shipped same day via Parcelforce 24, but crossed the weekend so only received today as for some reason they didn't come on Saturday (Parcelforce normally always deliver at 9am on a Sat morning and get me out of bed, but not this time it seems).
Checked out the boy's G36 first, way more solid than I was expecting for its budget price and all plastic build. Added bonus is a load of my existing 2S car LiPos will fit in the front stock so he's set for batteries for life. Hooked up a 1-point sling so he doesn't drop it on the first day, but to be honest it looks like it could take a tumble and shrug it off. He is smitten which is the main thing.
Double Eagle next. First point of note is it seems they are supplying midcaps now instead of the advertised hicap mag (or at least they did in mine). Not sure if I consider that a pro or a con yet.
Measured the buffer tube and ordered a couple of batteries from Vapextech, but managed to get a few test shots with one of my spare (but too big) batteries hanging out the back. Feels much more responsive than the rental guns I've used so far, whatever trigger lag there is is pretty imperceptible to me. No idea on accuracy or power til I get to a decent length range and my chrono arrives from China.
Fit and finish is about right for the price, well screwed together aside from a couple of rattly catches and a bit of wobble in the stock, metal is pretty thin but then I'm not planning to hammer nails in with it and I have to lug it around all day.
Ergonomics are really good, all very subjective but fits me better than any of the renters have so far.
Not sure I'll be getting another game in until the end of the month now, so field testing will have to wait.