Hi dan, I'll try and help a much as possible anyway, the clicking from the motor, it could be that the motor is a little out of adustment. Try and losen the bolt and turn the motor in the bracket, it will adjust the tension on the belt ( try both ways adding tension and removing some tension it is a bit of trial and error) also make sure the motor is fully fitted into the bracket, they have a habbit of sitting at a slight angle,
the pod and control box sounds like a lose/ broken connection, wire or plug, check all the connections in the control box and look for any damage.
The tensioner you need to drill the slight indent out in the frame and screw the two bolts through there,
we use a quad bike lift it is height adjustable and quite small, but I do like the idea posted on the forum for the upright stand.
You are always welcome to join us down here in margate we don't need much of a excuse to get out along the sea front, and we do hope to be up in milton keynes soon for a ride,
to move the c5 around roof bars all the way, we have travelled the country with one on the roof, just make sure it is tied down very well.
I hope this is of some use,
have fun
Neil