thanks bagger I just got home from Dyno Dave who had a manual
dyno had some special brake part lubricant for the pin and outside surface of the piston we used after thoroughly cleaning the old parts with brake cleaner, a toothbrush and a soft wire dremel tool and then changing to new pads.
I am certain that I could do the job myself now as he let me do the right side after we did the left side.
The calipers were sticking cause they were all dirty and gummed up. Big difference. The old pads were hardly warn but they are now in my bag as spares. can never have enough parts on hand

Never needed to do a rebuild after cleaning everything up. Perhaps fork oil had got in there or just it was dirty from riding in the rain and such. Whatever she handles and brakes way better than before and the front wheel is not locking up on me now