Lolipop

Hello to all IWC experts. I just discovered this new hobby about 4 days ago and since then my life is completely destroyed... I bought 3 watches within past 2 days from Joshua and ones from exactreplica about 3 weeks ago ( I did not know WRG then... ), which I think is a lost money now. I have few questions regarding how to change Day/Date wheels. I bought GST Ti and Slevin and they are on their way. I read many problems regarding this alignment issues so I am considering ordering ETA parts from watchpart. Now the questions - Are these the correct parts for both watches? Valjoux 7750 3'o clock white on black (both day and date at about 8 GBP) - Is there anyboy I can send to within EU (I am in UK) for this work? Or can I bring them to the local watchsmith? What is the cost I am looking here? Sorry for the long email but I will really appreciate any help from the experts. Cheers Sean