I am going to guinea pig my xb-700Li out for a 72v mod. Any input from the grand masters of the board are certainly welcome. I am inspired by the 600 72v mods that seem to have added about 15mph to the bike's speed.
I plan on trying to make things as simple as possible by trying to find the most compatible as-close-to-drop-in replacement 72v 40a controller possible. For now, I think I will probably end up adding two SASL's instead of more lithium ion to the bike. I anticipate charging the SASL's separately to keep things simple for now.
The first place to start is the controller. I have located a few potential 72v 40a replacements and would like input from others as to possible reputable people to buy from.