That's fine - happy to try and help!
So, on the rear of the DD steering wheel hub, there is provision for multiple peripherals to be connected into the rear of it - such as pedals, shifters, handbrakes, etc. The theory being that with the number of USB ports on PCs (and especially consoles) being limited - that it's better to bunch them altogether into one 'hub' and then have that make a singular connection to the PC or console itself.
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The cables used to connect to the DD hub are RJ12 - but these are only good enough to transmit and receive signals at very low voltages. If the peripheral needs a firmware update, RJ12 isn't sufflcient to do that. So, the only other option to update it is via USB and plug that straight into the PC or console. The key thing here is that you shouldn't connect the peripherals with both the RJ12 and USB cables at the same time or there is the potential of stuff going bang.
Simply put - plug everything into the DD hub as seen in the picture above and have that hub being connected to the PC or console via a single USB lead. Nothing will go wrong that way.
I'll admit, as I bought the seat with the frame, I don't actually know what options are 'easy fits' from real life cars. I've seen many options done online - but some of these tend to come down to the ability of the owner. Some are fabricators in their day job and think nothing of welding up some mounting plates and/or brackets. It can certainly be done - but it's just a question of how easy that is and what your patience level is like.
This is the default seat that comes with the frame. Plenty comfy enough for me at 6' 1" when pushed almost fully back. Please ignore the state of the NLR runner mat underneath - the cat loves sitting on it and it's a pain to hoover!
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In terms of delivery - the Fanatec kit took around two weeks from order to turn up. As
@N0ddie mentioned earlier - you'll have an additional tax to pay (usually to UPS) before it will be delivered.
The NLR frame was much quicker - around 3 days when I ordered it from Scan. It comes on a pallet and is
fooking heavy - be prepared to open the outer packaging at your door and to break it down. When in situ, the frame is approximately 135cm long by 55cm wide - to give you some idea of size. If you need the Fanatec pedal base to go further back, expect to increase the overall length by a further 15cm or so. My room is narrow but fairly long - which makes the placement of the frame perfect at the far end, next to the window.
Putting the frame together is very easy - the knack being to loosely attach the bolts before confirming where everything needs to be set to and just taking your time. For example - the seat frame will not slot between the main frame rails if you have tightened up the frame bolts beforehand. Not a chance. They need the slack and give for it to shimmy into place. I've never fitted the roller wheels that come with the frame kit to mine either.
I currently have the old ClubSport for XBox wheel on mine at the minute - but the default CSL wheel that comes with the Fanatec bundle is a very nice wheel to use as well. More so as it has an integrated shift up light at the 12 o'clock position at the top.
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It seems a lot of expense, a lot of messing about and a bit of frivalous purchase to be honest. I even questioned why I'd bought it when we moved in and kind of regretted it a little as I hardly ever went on it with my previous Logitech wheel and pedals.
When I pulled the trigger on the Fanatec DD stuff - it was a game changer, literally. It makes the driving feel better and more enjoyable overall. And aside from Forza if you're using an XBox - I cannot recommend buying Assetto Corsa Competizione (ACC) highly enough. It's very difficult, quite unforgiving and very limited in scope - just GT3 and GT4 cars. But as a driving simulator, it's superb and is very rewarding when you get a decent lap in - or outbreak another car into a corner.
If and when you get the frame and you're sat quite low to the screen - try removing the drivers arms and steering wheel from the display. I find it a lot more immersive with my actual wheel being the only steering device in front of me.