Rule. 511. Change of place of trial. (a) Time for motion or demand. A demand under subdivision (b) for change of place of trial on the ground that the county designated for that purpose is not a proper county shall be served with the answer or before the answer is served. A motion for change of place of trial on any other ground shall be made within a reasonable time after commencement of the action. (b) Demand for change of place of trial upon ground of improper venue, where motion made. The defendant shall serve a written demand that the action be tried in a county he specifies as proper. Thereafter the defendant may move to change the place of trial within fifteen days after service of the demand, unless within five days after such service plaintiff serves a written consent to change the place of trial to that specified by the defendant. Defendant may notice such motion to be heard as if the action were pending in the county he specified, unless plaintiff within five days after service of the demand serves an affidavit showing either that the county specified by the defendant is not proper or that the county designated by him is proper. (c) Stay of proceedings. No order to stay proceedings for the purpose of changing the place of trial shall be granted unless it appears from the papers that the change is sought with due diligence. (d) Order, subsequent proceedings and appeal. Upon filing of consent by the plaintiff or entry of an order changing the place of trial by the clerk of the county from which it is changed, the clerk shall forthwith deliver to the clerk of the county to which it is changed all papers filed in the action and certified copies of all minutes and entries, which shall be filed, entered or recorded, as the case requires, in the office of the latter clerk. Subsequent proceedings shall be had in the county to which the change is made as if it had been designated originally as the place of trial, except as otherwise directed by the court. An appeal from an order changing the place of trial shall be taken in the department in which the motion for the order was heard and determined.