I like the tool to measure gradients, simple but effective, nice cheap engineering solution
The secondhand powabyke might be an idea, these bikes do seem quite expensive for what they are, I think I need to try one out, there is bound to be somewhere in Bristol that does them, I've not really looked that hard to be honest as I wasn't sure if it was a realistic proposal which is why I stumbled upon this site looking for information.
Reading through the posts the e-bike sounds like it could be a good option for me.