question about tournaments permission

By yaoull, in X-Wing Rules Questions

I've read that:
- the figurine must not be modified (painted allowed)
- the socle must not be modified (increase weigth allowed)

--> what about the stem ?


I want to modified the fixation system, with magnetic stem : if a don't change the socle and don't change the figurine : I'm going to be refused on tournament or not?



If it's ok like that : can I cut the plastic peg under the ship and change this fixation or it's treated like a figurine modification ?
ty

I doubt anyone would disqualify you for that.