Alright. OP gave the go ahead to attempt since the drive will be junked. Unfortunately, was not successful. Had issues with getting the heads out of the park area and I think that was the main issue. Will be posting both drives back to OP tomorrow or later in the week. If the heads were easier to remove from the park area and not so close under the platter - think it would have been successful. But - hit and missed this trip. Apologies to the OP - was really hoping to recover something. And as @Chris said - have backups.
Knowing the solution doesn't mean knowing the method. Yet answering correctly and regurgitation are considered "learning" and "knowledge".