long story short i was trying to change the oil in my hubs last night and couldnt get the 3/16 allen plug out of either hub on port side of trailer.. i need to know if there is a trick to getting them out? i guess the guy i bought the boat from overtightened them or use thread locker.. i tried heat penetrating oil, everything.. I also need to know what size threads the plugs are because if i ever get them out i will need new ones.. thanks guys!!!