As an update, for those looking to do that Hobao pin mod on the rear that says they are 3mm, they are actually 3.5mm thick the 2 packs I got in. I ended up drilling out the a-arm and hingepin hole areas on the carrier inserts to use them. It worked but something to get in mind if you were like me wondering why they were not going into the insert.

Next thing noticed and maybe this is a exotek specific item, but the spindle block I htink what its called, the part that goes into the caster block up front seems to cause the ackermann plates to hit the webbing on AE style front wheels even with a +2 mm offset hex. I had to dremel slightly the corner "L" part for clearance on those.