Hey guys, I'm posting for advice on Charles Tyrwhitt dress shirt fitting and tailoring. Recently I purchased a 43/89 Charles Trywhitt slim fit shirt. It fits pretty well however at the waist it billows. I am 5'10 with broad shoulders but with a 32/33 inch waist.I sized up hearing the C.T shirts may shrink just a little over time and having a swimmers build thought a 42 may be too small. For others with experience with C.T is it worth returning and sizing down or is some altering best for the extra fabric at the waist?