John,
Welcome to the ICS Forum. You may already know that a POH for the Turbo is available
http://www.comancheflyer.com/NS/hold/h1/poh.htm
In terms of the Miller Conversion and STOL, there are people on this forum that have these mods and hopefully they wil chime in.
While it doesn't show on their website at
http://www.shopknots2u.com/store.php?crn=219 Knots 2 U did buy all the miller STCs amd may be able to help.
I've passed a message to a person I know has the STOL kit in case he can help.