This raise can change the position of my SF and turn it to a PF on the future.
Maybe you are giving too much importance to the position in upper right corner of your player. This position is assigned by game engine (GE) and is important for new players so they know where to put such players when setting their lineup. It doesn't mean his salary will be greater if he is a PF rather than SF or that he will train slower in outside skills if he's not a SF. You can totally ignore what he turns into. If you take a C and train him enough in Passing and Outside defense, he will inevitably become a Point Guard. Does that mean he's a Point guard now? No, it just means he's a C who can pass and defend outside shots well, but GE still assigns a "PG" to his position.
Anyway, i understand you don't get my pov if you haven't trained such kind of players.
If you understand how assigning a position by game engine and salary works, you didn't have to train such players to see that actually you are the one who doesn't fully understand these things.
Take for example this player:
Jump Shot: prominent Jump Range: strong
Outside Def.: sensational Handling: wondrous
Driving: wondrous Passing: inept
Inside Shot: marvelous Inside Def.: wondrous
Rebounding: sensational Shot Blocking: sensational
Game engine will tell you this is a Center. But from my point of view, this is a great inside SF (that you shouldn't play in highest league because it doesn't have enough OD) or great PF in general that lacks a bit of PA.
PS: And this 0,03 it's just your guess because it could be a 0,5 without problems.
It can't. Since 0,5 would be 10% (cross-training rules), you would have five pops in SB from one week. But since double pops are for now just rumours, let's say no skill can increase for more than 0,67. That makes your cross training "pop" worth no more than 0,06.
Hope you understood our pov.