Precharge necessary?

[somfas]

Sorry for asking this again, I did get a reply on here before that a Precharger was not necessary. However, Ian says that it is (see his comments below). Can anyone help clarify? Does the Precharge have anything to do with converting to Lithium? It seems that it is primarily related to the motor and the controller, both of which will stay the same during the lithium conversion. I don't mind paying a little more to do it right, but he even says there is more wiring; which concerns me. I don't want to make it any more tricky than necessary. Thanks