Hunter Trapping:
DC does not calculate properly.
Correctly applies the Ranger levels to achieve +6 (16dc) but does not apply (craft engineering skill /5 ) leaving the current maximum DC for the trap at 16.
DC can only be checked via disarming (See wiki entry)
Hidden: show
Hunter Ranger Trap interaction:
As of this post Hunter rangers do not receive a take20 on recovering traps as the Rogue class. This seems like an unintended oversight for a class themed around trapping.
Epic Spike trap - Beregost shop:
The Epic spike trap for sale in the beregost shop places as an average spike trap several damage and DC categories down and recovers as such.