I tried the star shaped deal that fits behind the broahead, and it affected my arrow flight so bad i had to take em off! personally I don't think the arrow passin through the turkey will keep you from recovering your turkey. he may go a little farther, but I've seen em go a good piece even with the arrow still in.
you might try filing the back edge of one of your broadheads to where it's dull. they say this prevents a passthrough. never tried it myself.