Welcome to the forum !
It is a โwholeโ system and everything is important. Plus interacts with each other with dependencies that affect each other.
Length does matter, as the lever arms are longer than before. Levers for any bow wake to do itโs nasty job.
Sail area plays with length and lever arms.
Where the trailer axle is in reference to the coupler/ball makes a bigger difference than most think. this is part of the trailers architecture. Center line of the trailer axles should be behind the center of the total length of the trailer box. Some has it farther forward to reduce tongue, so lighter duty TVโs can...on paper.
Tongue (actual loaded weight) should be about >12%-15% of the total trailer weight.
The orientation of the trailer is more important, but not the only metric. Trailer should be level AFTER setting up all of the dials and knobs. Prefer pointing slightly down, but NEVER pointing up. It follows better level or pointing slightly down (after setting up).
Andersen is not a fav of mine and many report here that higher weight trailers have problems WDโing enough weight back to the TVโs front axle. I like BlueOx, but nothing against any other, except for Andersen (that is just my preference)
WD Hitch systems are all good, IMHO. Make sure you have actual loaded, trailer weight when looking at the spring bars. The bars should be rated more than the trailerโs actual, loaded weight. How much depends on that actual weight vs what is available to you.
WD Hitch head can be tilted โbackwardsโ on some systems. That is to point the bars downwards, so that the tensioning system has more travel. Therefore able to tension the bars more.
Careful of being sent into circles dialing in one area without making sure it didโt effect another area. Just know that all the dials/knobs have an interaction with other dials and knobs.
Goal is to finish with the TVโs front axle returned to whatever your OEMโs manual says. Some say back to original Fender height before adding the tongue. Others say back within some +/- weight of original axle carrying weight BEFORE dropping the tongue on the ball.
Then that the trailer is level or pointing slightly down.
Finally, the TVโs tires must be able to handle both the weight and the push that comes from towing. That comes down to how strong the TV tires sidewalls are. Both by construction and by how much PSI vs max sidewall listed.
-Ben
Picture of my rig1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
1998 Mazda B2500 (1/2 ton) pickup, 2nd owner...
Praise Dyno Brake equiped and all have "nose bleed" braking!
Previous trucks/offroaders: 40's Jeep restored in mid 60's / 69 DuneBuggy (approx +1K lb: VW pan/200hpCorvair: eng, cam, dual carb'w velocity stacks'n 18" runners, 4spd transaxle) made myself from ground up / 1970 Toyota FJ40 / 1973 K5 Blazer (2dr Tahoe, 1 ton axles front/rear, +255K miles when sold it)...
Sold the boat (looking for another): Trophy with twin 150's...
51 cylinders in household, what's yours?...