you have the bike and the hills - I might just ask you for a visit.
You'll be very welcome anytime Peter, Torq, Twist and Quando II for trial. A run out together with Torq and Quando to some of the hills would enable direct comparison. See below*.
I have a job to maintain 8 mph - what I need is a cast iron guarantee that the bike (whatever it is) will do 10% unassisted so that I can leave off pedalling from time to time on the grinding climbs and come back in after a breather - is that asking too much?
It does 10% easily for my 74 kilos and will also climb 12% unassisted, and can even do an unassisted restart on 12%. Because you're heavier, you'd need to try those for yourself.
What would be best for such a Grand Tour - Li-ion of NiMh?
Where extended climbing is concerned, NiMh every time, since it will never suffer cutout until empty.
Quando I or II? The Quando I I believe, I saw in a post of yours, had a less than robust carrier and the II was better - but is not that the model for shorter folk?
Your 6' 3" is a problem here though Peter. The Quando II is only suitable for up to 6', it would have to be the suspended Quando I. Since that has bungee rear suspension it has a limited small 10 kilo carrier, not enough for touring, unlike the full size 25 kilo one on the Quando II.
Strange how so many, particularly when young, wish they were tall?
I've always been pleased that I'm 5' 6", since it makes life so easy. Beds, chairs, cars etc, never any problem with getting a fit, and I'm just tall enough for bikes and motorbikes. Easier to hide when things go wrong too.
*I have a list of carefully measured test inclines:
Ctwd to F.D. Cresc - - - - - 0.5% - - - - 1 in 200
Ctwd to Sels Pk Rd .- - - - -1.5% - - - - 1 in 65
Courtwood Lane - - - - - - - 2% . - - - - 1 in 50
Lodge Lane - - - - - - - - - 5.5% - - - - 1 in 18
Pixton Way . - - - - - - - - - 6% - - - - - 1 in 17
Bardolph outgoing - - - - - - 7% - - - - - 1 in 14
Bardolph incoming - - - - - - 10% - - - - -1 in 10
Sorrel bank . - - - - - - - - - 10% - - - - -1 in 10
Peacock Gardens - - - - - - -12% - - - - -1 in 8
Markfield Hill - - - - - - - - - -14% - - - - -1 in 7
Markfield Path - - - - - - - - -17% - - - - -1 in 6
Markfield Lwr Path . - - - - - -22% - - - - -1 in 4.5
all within 1.5 mile radius.
.