Managed to get the last bits done to get the Rock Hopper rideable and boy is it fun on the gravel tracks round my ends! Haven't ridden a bike with anything bigger the 25c tires for about a decade and I've really been missing out. Absolutely love it.
Picked up a Minorah Gamoh Porteur rack from @Dick last week and whilst it's fairly heavy, it is sturdy AF, mounts to existing mounting points and looks exactly as desired too.
Other bits are a 38t Raceface chainring, fitting the Deore derailleur and getting the brakes to a just-about-functional state (got a bit overzealous and ended up in a bush for lack of braking effectiveness).
Next on the list is tidying it up, but I don't really want to take it too far as it just makes it more nickable, and sorting the brakes! I also have a custom bag for the rack coming from @user71349 too!
Any suggestions on improvements welcome (other than more effective brakes, obvs!), but for now I'm just going to enjoy smashing around on it until something breaks.
Another gratuitous puppy pic included just for @vpCogworks