[lincpimp]

I am sure 4mm front and back would be fine. I like the thicker stuff under the pinion as it gives more area for the hingepin retaining screw to thread into, and must be stronger. If you plan to use a different method to reatin the pins I see no need for the thicker stuff. And you would not have to trim the tvp if you went with the thinner material.

The stock lst upper arm is not threaded, only way to do that would be to go with the rpm lst arms and just use the end. However rpm do not make a dedicated lst2 upper arm, the use the lst1 arm they made way back when and just use some spacers to fill the void on either side. Have a look on rpms site for more info on that.

I am not sure of the rpm turnbuckle size, but will bet that it is std thread, not metric.

Keep an eye out, some of my cen parts arrived and I will start a new thread on that conversion tomorrow. The cvds are massive, make the shd shafts look like mini t parts.