if you use them, make sure you lay out clearly what you want and what you dont want.
For instance, do you want frame inset panes (8 by 6 etc) or original (and fragile) leaded light, when theres enough standard 1930s and new builds around?
Qualify exacty what the rebate scheme is for poor pricing as well. Ive seen some big houses quoted rediculously low just to get the salesman his commision, then you are lumbered with it.
