Inserts for Ifmar stud on a B44

[charles08]

Hi,

As title says ! What inserts do you use with red Ifmar stud tires on a dry clay/dusty track for a B44 ?

And also for the B4 i was going to use losi red ribbed in front with bow ties and stock inserts for the same track, good choice ?
What front insert ?
I'm lost with inserts !

Hell that's a lot of questions but can't test before going to the race so would like to pick the right stuff !

Thanks .