felixx wrote:... if 2 is good, then 3 must be better!
So if 400 kg is your goal weight, then 600 would be better?
To keep things in check for a small TV you might want to start thinking lighter. Remember that the strength of the assembly is greater than any one part. Think airplane, not tank.
More often than not first time builders find that they have overbuilt (at least some aspect of their build) and wish that they had built lighter (that, building five wide instead of 4, and having a second side door).