My build is kinda ‘complete’, although there’s now a long list of improvements I’m working on.

It’s 2014 80kW Leaf based but with later 62kWh battery.

Checked and authorised by DVLA, so now registered at electric in the UK.

I’ve done 1200 miles as an EV so far.

Main build thread is on Open Inverter forum as this forum didn’t exist when I started.

Currently looking at switching the annoying vacuum pump for a silent ibooster for the brakes.

I used the common Bosch brake ibooster used on many cars in my conversion. There’s no specific integration required if you get one that isn’t Can controlled.
There’s a great detailed write up on EV Create with a list of units. Also another list on OpenInverter.