Pavel,
Good to hear your new steed is running you in nicely…
Frames,
Yes the Thorn steel frames are rigid enough for a very heavy load, but still feel alive.
My old Dawes had the jelly feel when fully loaded, my Thorn is so much better.
Brakes,
I found KoolStop salmon best for wet conditions, pink/black combo best for all round use on Sun Rhynos. I am now using KoolStop black CSS on my CSS rims after giving SwissStop blue CSS ones a try, they worked well in the dry but they let me down in extreme wet conditions.
I have had no difficulty changing the blocks in the XTR brakes.
If you are running alloy rims, not CSS, then get rid of any Shimano blocks - they chew the rims up as bits of alloy get embedded in the blocks, KoolStop seem to be a lot better.
Rohloff hubs,
My second one runs smoother and changes gear slicker than my first one - maybe there are improvements we don't hear about, or it is just pot luck.
Dynamo lights & wiring,
I use a SON dynohub and Supernova lights and gold connectors, E3 non dazzle at the front, E3 connected rear rack light (small with 3 leds).
The connection to the dynohub is standard spades which I only undo to take the wheel off, front wiring is ziptied to the forks.
The front light is Thorn accessory bar mounted with 2 sets of gold connectors, one set for the dynohub wiring with 2 males to 2 females, one set for the rear light wiring which is 1 male and female to its opposite 1 female and male from the rear light. The rear cable is wound round the gear and rear brake cables under the top tube then snakes along the under top of the rear rack with a few zip ties.
The dynohub feed is AC so either front light feed wire can connect ok, but the rear light is DC so you must get the right wires connected - the rear connectors will only connect the right way round and can also be done in the dark by feel.
The gold connectors are crimped, no soldering, but work ok - I have been using them for about 2 years and remove the front light about once a day. I live in an area where someone else will remove the front light from the unattended bike if I do not!
Safe riding,
Julian.