I am preparing now (myself) a provisional patent application. A patent attorney once told me I need to make the application “light” enough so that when a professional patent attorney later files the regular application based on the provisional application I wrote he won’t be too tied or restricted by it. Of course, it also shouldn’t be too general for it will be disqualified.

How do I find this proper balance?

How much can the patent attorney chnge the PPA when preparing the regular application?

Is it wise to write more than one claim in a PPA?