Hard to say. The cracks do "appear" to be chemical related. For example, the thread lock does shatter the Tamiya plastics to a trillion pieces. We've never seen the plastic crack like that, except when it becomes brittle
-problem is I did not use any thread lock.
Only chemicals that ever touched my car were Simple Green and Banana Lube
you say you've never seen the plastic crack like that except when it becomes brittle. What do you mean, -how does it become brittle? ...because mine became brittle
