I have take another look on the issue of the player scaling today,
i did try to modify the meshe and not the scaling in the dino bp, but that change nothing :s (in the preview of the meshe the glass are not resize but in the game it is.)
i see that i am not the only one with this issue, mike with it’s alpha version have the same issue, if you ride an alpha raptor you become bigger 
and the mod bigger bronto and mammouth have this issue too.
i can’t find where the pawn choose to resize after ridding a dino, i’m almost sure it is on the saddle side since the dino is link to the saddle who is link to the pawn. the saddle resize itself when on a smaller dino, then the player resize itself when on a smaller saddle, or something like that.
i was thinking that maybe the only way to do it will be to export the meshe in a 3d program to resize it here then import the new size meshe in the dev kit? (hope not since i don’t know how to use 3d program or even wich one to use for that :x )
so mike or other do you have some idea for this issue? 