Well, all done and dusted pretty much.
The guy was here at 8am and done by about 11ish. I'd had some mains sockets put inside the "comms cupboard" (cupboard under stairs) and so I made another little hole with conduit through wall between the understairs area and cupboard, in the hope we could get the ONT sited in the cupboard if the engineer was amenable. Still a bit of making good to happen after putting in the sockets - and a lick of paint. The job getting pulled forward caught me a bit unawares.
The engineer was happy to oblige, started by routing the fibre from the inside to the outside, locating the ONT on the wall, a tiny little Nokia unit.
Then proceeded to pull the fibre through the roped underground duct from the CBT and fitted the CSP on the outside of the house. He said there wasn't enough room to get an elephant's foot over the duct due to where the duct had come out of the ground in relation to the hole in the wall, so I just have the duct with a bung in it. It's in a heavily shrubbed bush infront of the house so I'm not really fussed, it's not the very best, but I can live with it.
The fibre cable was clipped along skirting tidily using metal fireproof clips making nice swept bends and going straight into the bottom of the ONT.
A splice later and we were ready to go. I'm at -13dB on the light level, apparently it leaves the exchange at -11dB and is good all the way down to -26dB or so.
Connected up the Zen router (Fritz box) and... nothing, despite the ONT looking fine. Call to Zen support, they only activate the line once the engineer issues KCI3 for the job apparently. Anyway, he closed the job off, and a few minutes later the router had rebooted and connected.
Speed tests in the region of 900 down with sufficient download threads / 110 up no problem. Pings seem to vary between 7 and 9 seconds - I guess this depends on exactly what bit of kit the PPPoE session connects to. You can see the slight step between PPPoE sessions. Feels very nice and responsive
Won't be using the Fritzbox, but finding the Unifi USG4 Pro is proving a bit of a bottleneck, and am going to have to look into that. There are lots of options around hardware offload that all seem enabled, and I think I've disabled the things that disable offloading. More fiddling.
It's very responsive in use. Pleased with the upgrade.
Ping chart is a bit messy as the power in the cupboard has been up and down a couple of times.