Yes I am about on friday. I'll need to know an eta to within 30 minutes either way.
Yes I sell batteries made from sticks from the same source as the BB ones.
I'll show you what i do when you are here.
The cat in the Insight is a special three way type all in the same container. Google it.
It also has an oxygen sensor before and after it, so if you remove it you get error codes.
There are no aftermarket ones in the uk, but they last years. 10 minimum IMO.
The prices for all Honda UK parts is online. I dare you to look at the cat price
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Item 2 in this picture.
Gearbox main problem is input shaft bearing. Syncro can be modded.
Main cost is the labour getting it in/out and then rebuilt.
Steve at Auto-tech Thirsk rebuilds Insight gearboxes for my customers.
I have spare gearboxes but they aint cheap.
Re the battery. Learn what positive and negative recals are, and when testing see if the car exhibits any of those.
Use WOT in highest gear possible. So 5th gear from 25mph.
e-mail me at my signature below to discuss a visit.