I ordered 2 4T6531 center cutting edges and bolt/nuts today from Warren Cat. I do agree with you get what you pay for, and I always liked cat's bolts and nuts better. The 4T6513 are just barely shorter in length than the 4T3418 edges. Hoping the shorter overall length will allow me to leave the end bits on(no cutting of bolts) and just simply replace the 2 center edges. If not, I've got a grinder. Will likely replace the whole edge later as Nige suggested with 1.75" thick hardware.
Also ordered the shifter guide 2M8796, crazy for spending that much $$, but I want it to be right and stay right for a long time.
Ran it today about 2 hours stripping topsoil, it's incredibly hot here in southern oklahoma, engine water temp gets to 200f, I let it sit at high idle for 10 minutes and the temp drops back down on the gauge. Oil pressure is a smitch low but I'm running 15-40 instead of sae30. I've also noticed the fuel pressure gauge isn't in the green, but in the middle. Don't quite understand the fuel pressure as this is my first machine with this particular gauge.