| Hi there, Just thought I'd share some info. All the current issues have been dealt with and our next batch will have various additions noted and then some. I believe you seen the original version back at Ztune's opening? Just for the record we have been installing the "Midori" arms since their inseption and then the Coutesy Nissan versions which were in fact Top Speed units - this is prior to Powetrix's versions. We ended up going straight to the manufacturer for cost and spec reasons. We have not had any major issues thus far with installation or wear. Over the years I have seen less than a hand-full of failures, all seemingly due to road conditions. This includes the AMS/Powertrix/Top Speed/Courtesy/ Even E-Bay versions! The E-Bay versions are really bad as they do not use a Japanese Bearings from the samples I've seen. The collars will crack with excessive tightening. I have yet to crack one personally. The Larger collar will 'prevent' this but not guarantee against cracking should someone decide to 'reem' on it. With the solid/rigid suspension they are simply more prone to breaking with sudden/harse impacts (e.g. pot-holes). We have also been testing and developing another AMS unit that we will offer in addition to the turn-buckle Midori Style in the near future to give clients an option - simple economics and marketing. Hope this info helps!
Regards,
Vuk@AMS
[ www.amsztore.com ] :The original Arm designs had a few shortcomings and after checking out the AMS arms it appears they copied all the original problems.
:The original design locking collars were very thin that AMS is using. What happens if you tighten down the locking collar tight enough to keep the threaded collar from flexing it causes the locking collar to crack and break. It was/is simply too thin.
:The Powertrix arms have sealed bearings and the AMS are shielded bearings.
:Another problem with the AMS arm is when you tighten down on the bolt going through the bearing it is side loading the bearing and will cause the bearing to fail.
:The powertrix arm has a shaft going through the bearing and when you tighten down the arm your tightening against the shaft instead of the bearings.
:The stock arms and Powertrix arms are different widths between the bearings on each end to fit the different widths where they bolt into the rest of the suspension parts. The AMS arms are same length between the bearings on each end causing them not to fit in the rest of the suspension parts properly.
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