hi SS25
as mentioned above a good de-grease and polish & de-burr & tight fitted guide and top hat,will sort out your twang!
i will agree with Vizlauk,a friend of mine bought one for his AATX, and we also binned them,they were loose fitted and did not remove the twang!
however i have learnt now,that you can send you spring to Tinbum,and he will fit the guide & top hat to your spring,these are custom parts made to a manufactures spec i believe?
and as we all know springs at AA are mass produced/supplied,so as i see it what you are buying is mass produced guide & top