Countermeasure

An idler arm bracket in steering linkage was ordered that is measuring for handle shimmi phenomena. I feel the reason why the unreliable steering reaction on VW 1302 Super Beetle might be some lack of strength in geometric construction of steering linkage.
I'm going to erase the distortions of stress concentration points one by one.
Newly ordered counterplanning genuine parts has solid diecasted body with pressing set bronze bush eliminating positional movement of idler arm hinge position.
Replacing with this relatively expensive parts would carry some good result in steering action,but remember here that that changing the hinge position into unmovable design means loosing some compliance for avoiding kick back phenomena on steering position,destroying the balance of original constructive design,as too much application of sound and vibration insulation material on the rear fire wall destroyed the balance and the residual gears and bearing moving high frequency noises have been emphasized after all now.
Unreliable steering action has much to do with the lateral stability on rear axle construction,especially on the bushes equipped in trailing arm hinge portion. Paying best attentions on the point,checking rear axle construction is indispensable procedure.