Well this is my last post on the subject since you obviously don't get it, and thus you never will. I'm not repeating myself so if you want to keep arguing with yourself that's fine with me. YES, the RXB doesn NOTHING. If you were me, you would have cut apart numerous A70's, you would have seen the massive boxed brace that runs the width of the car no more than 2" from where the RXB mounts. This brace is welded into the car in far more than two points and thus is infinitely stronger. How else do I know, because I've built one. I wasted an entire day first building one from 1 3/4" cage tubing and then later trying to make it actually stiffen the chassis because it did nothing in its stock form. It's pointless and redundant, a marketing scam. :3d_frown: If you want to stop targa flex you fill the HUGE hole in the roof, connect the mounting points in a way so the two halves can not move independently in any direction, such as my X-brace. Either that or double up the frame rails underneath the car and leave the weak point in the roof. Now the side-side shimmy is not a natural thing, this is when the front end moves in unison, if your car shimmies any noticable amount to affect the suspension then you have other problems. The gaps in my hood and fenders are around 1/8", by your reasoning the front corners should have the paint chipped away because the whole front half moves from size to side and the hood will not move, right? Why not rig up my dial gauge to one of the fender ends and mount the other end to the firewall and actually measure this so called flex. I don't know where you get this stuff, flexing strut towers will not change steering angle unless your car is exceptionally low and you get ALOT of bump steer, even then you are not going to notice 0.1* of steering change while you're going into a corner. Also screaminglemon is absolutely right, dual A-arms mean the towers can flex all they want and as long as the subframe holds its shape there is no change in camber or any other suspension geometry (besides the minuscule amount of bump steer described). No one is arguing with you about how a normal STB works so I don't see why you keep repeating it. What is your point with the spot weld comment? Yes the chassis is spot welded together, so what. Welding makes metal hard and brittle, welds do not flex they break. So if spot welding was in any way weak all of the welds would have surely broken after 15 years of abuse. What do I know though, I haven't been welding and modding the suspension end of my A70 for over six years, I haven't tried and built parts 99% of members haven't even heard of outside of Japan, I haven't experimented with every kind of geometry change I can think of so I guess that means that I know nothing about anything and because I don't automatically jump on the bandwagon and simply repeat what I've heard over the years. :icon_roll Ne0z, I apologize if the bar can not be bent as easily as he made it sound. I work with heavy wall 1" steel tube many times and if that's what it is then it can be bent by hand if you have 1.5'-2' of leverage on it. I wouldn't have much to complain about if there was a bar directly between the strut towers. :icon_bigg Good luck with your next best comeback siman, I'm sure you'll have one. :biglaugh: