The 300 miles is over 5 days, but we do have some mountains to go over on the Isle of Harris. I have no doubts that it's going to be the toughest thing I've ever done, but I'm mentally prepared for that. I think it'll be fine. We have B&Bs booked for each day and I'm sure that the lure of a cold beer each night will be enough to get us through.
I'll report back when I've done it and let you know how I got on.
I'll take a look at the Charge Spoon. I think there are enough people to say that a Brooks isn't for me, this time. Maybe it's something I'll look at for next time.