See the attachment PDF details. and the STL file and some additional files are available thru, http://sdrv.ms/SwUpjv For no.1 problem, the person I hired last time says he can't do as instructed. he says, with given information, it's not sufficient to correct it. There's no schematic drawing available for this model, and only bunch of photographs. I am looking for someone who can correct no.1 problem in the attached document file. If you see the pdf files and images carefully, then you will notice what's wrong with the STL model in its head. thanks.