Hi all,
There is a feat retrainer,
There is an enhancement retrainer,
There is a spell retrainer,
why not a skill retrainer?
I would suggest similar mechanics and cost as with Fred. Timer could be even the same.
I would suggest that u can pay to fully untrain in 1 skill each time. Then use the points as you wish under the normal restrictions.
In case u have a feat/ability that has that skill as a prerequisite then the reset is down to prerequisites.
Cheerios!