It isn't as bad as some make it out to be, most of the problem is are people modifying without know what they are doing. Either engine built by a reputable person can last quite a while. With a 20b it is much easier to attain big numbers even on a mild build.^^ Achilles heel has always been that soft, fragile 13b. I dont know much about the 20b but if is as improved as you say it is, i agree that would be one FUN sumbitch.