I had my windows installed with 3M FXST20 (Casa), if I were to go to Tinthub or any VKool installers, is it safe to assume na di masisira yung rear defogger ng Altis pag aalisin na nila yung existing tint ko (planning on getting a VKool OEM20 in a few months). Masyado ba madilim yung OEM05 sa night driving? :D Mas prefer kasi ni misis yung medyo madilim para pwede daw sya matulog :P Thank you