I do have a "road runner" convertor that is basically new. I know that sounds so sketchy, but it was another basically new convertor that he threw in. I don't know much about it, that is what he called it. I will look it over and try and ID it.
I know you guys are more knowledgeable than I am, but I can't imagine the PTC being a bad deal in a light car driven correctly. Got some other pieces today so things are looking up.
I wouldn't have an issue with the PTC. Use it. If it's a bit loose they can tighten it up a bit.
I'll say the number 1 and 2 issues I see are guys not running near enough converter and not enough gear.