Another thing to consider is the trailer CG, your mod will add weight to the aft end. When fitting out the trailer for my Albatross, I cut down an old 601 trailer by removing about 6' off the end. That made the tongue weight more than I could lift, so I added 50# of lead to the aft end.............that made the trailer sway side to side so bad that I was forced to remove the lead weight and get 2 people to lift the tongue! Recommend against adding any aft modifications.
JJ