Reply to Midi Fighter Button Change!

So , here's my deal !

I've had my midi fighter classic for a long time now , the buttons are the best and most responsive i've found ! But with the new year , I've been looking to spice things up with new buttons , but I just had a few questions!

1) has anybody here changed their buttons ? Is it hard to change them and do they respond as well once changed ?

2) I was going to change the middle of my clear rimmed black buttons with other colours like white and purple! Has anybody here changed the middle of the buttons to an alternative colour? Again , is it difficult and do they respond worse , the same , better?

These are things I want to know !

Thanks alot guys,
Swede Dreams