And when the custy wants the insides doing ,of which could be your best custy.They
have to look else where,and i bet that the windy who trads the insides will try and quote for the outside = oppurtunity for lost work,i dont know any who work this way.
So you get the oppurtunity to quote for very large job good money and because you dont want to trad do you think the custy will want to mess about and find 2 different windys. Most wont .