TROYER underdrive pulleys

[fordkindaguy]

Hi, was just wondering if anyone has used the troyer perf. underdrive pulleys and had any luck with them? they claim around 13hp with a custom tune was curious if anyone had feed back on them as i cant find many reviews. Also i have yet to recieve my custom tunes, if i got it would it matter if i put it on after i got my custom tunes in? I dont know if i can make a custom tune with the programmer on top of the custom tune from bill to change the idle speed? thanks everyone for any word!