Its always worth restoring a PF.. even more so if you can do it yourself.
Not many people like to do this kind of work commercially as the time spent is not worth the end cost... hours far exceed payment. If you do get it done outside, don't expect to get it back anytime soon.. its a long and laborious exercise and one that many a restorer will have to walk away from time to time just to keep sane.
But bottom line " is Embryon worth it?"... absolutely, its a rare and exciting Bally title with a killer BG. Not many come up for sale and if they do they are worn to a nubbin... why?? Cos its a bloody great player!

..LOL- wish it were mine