The design requires the suspension springs to be at least 3/16" i.d. and the only ones I could find on mcmaster-carr that fit had a rate of about 4lbs/in. (There are six, so it's really 24lbs/inch) This is roughly equivalent to not having any suspension. It also requires an extra steps of cutting brass tubes to fit between the bolt and spring and drilling the strut brackets out to 3/16"+ which is really close to the edge. I broke one while attempting that which means it is an unrealistic plan. I've ordered some nylon flange washers which I hope will allow me to solve the issues with the frame 02 suspension.
This frame was the first kerf-corrected design. In general stuff fit well. One issue was a crack in the top deck where the servo rib tab is inserted. That part is much thinner than it ought to be but there is no obvious way to correct it because it is somewhat dictated by the distance from the drive cog to the rear road wheel. I am going to open that tolerance slightly. It won't break during assembly but it may not be sufficiently durable. The kerf correction also meant that the servo rib bracket is not actually required which is fortunate since the hole for it is in the wrong place. It will help with durability but if removed would reduce cutting distance by about four inches.