In reply to sebflynn:
Not sure mounting it on a post is going to work when you come to use it. You really need it mounted above free space so you can hang out of contact with anything. Best would be a doorway or roof/garage rafters. This also gives you room to put your bouldering mat underneath for when your fingers uncurl at the end of reps.
Is there any way of bringing timber/plywood off the post so you can hang freely?