albion2 wrote:It looks like I can build a T/D on my trailer without worrying about weight.
I think "without worrying about weight excessively" would be a better statement. You can, quite easily, build a trailer that exceeds 970lb loaded.
So you still need to look at each part as you make it and say to yourself "how thick/heavy does this
need to be?". Every time you say "I'll just use a bit of 3/4" ply - it's easier", your trailer will get heavier.