RCVisions.net has just released their Pro-Brace chassis brace for the Mammoth ST, Pro, and soon to be released "XST"
Weighs less than the stock XTM braces, and reduces chassis flex to Zero from end to end. If you have a Mammoth ST, or Kyosho US Sports truggy check it out at
http://rcvisions.net/STtowerbrace.html
An XTM factory driver has been using one for 4 months and says: "It works flawlessly. Zero chassis flex, and lighter than stock."
avdub