Let me start by saying, I am aware that the stocking of exclusive models from other shops and groups has been going on for sometime and I don't really care who stocks what, from where.
However, I am going to make myself look incredibly dim, when I say, I don't see how allowing other shops sell your exclusive models, is going to mean you sell more items - unless you are getting cold feet over what you've commissioned and are looking to offload some of the pain?
In this day and age, who needs more than 1 store selling a particular exclusive model? Surely, a very large % of purchasers have access to Hattons as either a shop you visit, an online retailer or a retailer who accepts telephone orders (if you see their advert in the press or online).
For me personally, I have bought, and have on pre-order, a number of Kernow Model Centre exclusives - why am I going to hope or wait for the day that another retailer is going to stock that item?