yo man i love the new theme edit under funky widgets etc my only thing is how can i adjust or make changes to castbars without a "test" feature to throw some castbars up under some name plates of target dummies for example i had to have a homie recast his hearth like 100 times before i was like yea ok man thanks for ur help but this going take all year xD maybe something to test or see what we are trying to modify without having someone in game do it? thanks again for all ur work man its really fucking sweet

A test mode or some indication of what the change you are making looks like would be great. And it's something I would like to add but it is a rather time consuming addition.
So until then all I can recommend is you look for some mob that had a really long channel the next time you want to modify the castbar. Or making an allied race warlock alt as they have access to imps immediately.