I agree with d8 - decent hydraulics are all but maintenance free and certainly don't need bleeding.
I'm sure good quality cable discs can be good, although they will need occasional adjustment.
Moral is buy quality kit of whichever type you chose.
Looks like you are running a single pannier.
A safety tip is to mount it on the 'off' or right hand side of the bike - it gives you more width and road presence in traffic.
This carrier from Thule should fit.
It will also fit on the front, might be an idea if you want to keep an eye on the laptop, and it will probably get a smoother ride from the fork.
Thule Pack
I've done the Kielder loop a couple of times.
It's about 26 miles and surprisingly challenging - a few steep switchback climbs.
The path is well maintained and more or less uninterrupted, which is a joy compared to most cycle paths where you have to stop for gates or give way at junctions...
WD 40 has insulating as well as drying properties so I would stop using it.
I think you can get some stuff for electrical connections, but using that is unlikely to be a reliable solution.
Each to his own, but hammering up there at that speed wouldn't interest me.
Apart from anything else, there's no opportunity to exchange a few words with the other cyclists which I think is part of the fun.
The owner of my local bike shop would disagree, which is why he's happy to service any bike no matter where it was bought.
I guess volume comes into it.
Realistically he's not going to sell many bikes each day, but can do lots of service jobs.
Yes, I did have a quick squint, not that the technical stuff means much to me.
I think I'm inevitably heading towards buying a spare battery for my Rose, so if you come across one at an advantageous price I could be your man.
Another reason might be there would be no money in it.
The Bosch battery looks expensive at £500, but no one would buy a pattern one unless it was much cheaper.
Could be Bosch are not profiteering as much as some people think they are.
Good speed there, Jamie.
Nearly 15mph over 20+ miles is respectable roadie pace, so you are doing well on a mountain bike, even with a battery.
Have you de-restricted the bike with a dongle?
Looks like you would get some use from one.
Doubt there's enough room for motor and battery in a Brommie wheel.
Seatpost/saddlebag batteries compromise the fold, and the Brommie bag is handy for, in my case, carriage of my flask and other bits and pieces.
A bit of weight on the front also improves the Brompton's notoriously twitchy...