More good info, thanks Dala. I am away from home at the moment but am doing two things while away:
1- rewriting my code to include the MPRUN/CSUM/CRC as described in your video. This will certainly change some of the outcomes I am getting and explains a lot about my lack of success on the OBC/charger project, I will be revisting that shortly I hope to. The more I think about it the more significant this information is.
2- Writing a new piece of code to run on a stand alone UNO and an MCP2515 that emulates a Nissan Leaf or at least the BMS relevant VCM & OBC communication. This will help reduce the code development time by not having to connect to the car until the code is really ready and advance the OBC charger project.
More to follow, Thanks again.