I came up with a plan which should solve my modification problem on my NT 5x8 trailer tongue. I bought the etrailer A-frame coupler which does not fit the angle of my NT tongue. Rather than reworking the tongue to fit the coupler and drilling different mounting points on the trailer frame I am going to use the method posted by 101camper. All credit goes to Denise (aka 101camper) from a post she submitted in August 2011 ( http://www.tnttt.com/viewtopic.php?t=45830&p=857544 ). It is a simple but genius solution to add a stable jack to the NT trailer. A simple template from cardboard to my local welding/fab shop should produce a very good mounting point for my Pro jack (same as pictured in Denise's photo. When I get that mounted I will add a photo.
Here is her photo from her post...
Please, if this is not acceptable to post her photo let me know and I will remove it. I am giving full credit to Denise on this idea...