ok, It took much longer time to make this work then the logic deserved acording to your wishes, mainly because I have not wrapped my head correctly around define-syntax and friends.
There is a discussion going on right know on accessors et all. I hope that you can detail the conclusion of that discussion in the end so that my inexperienced ears can understand. Anyway. Setters and getters of the match construct works as well on a basic level. e.g. (struct-ref n 1), (struct-set! n 2 x). So if there is a record with a custom getter and or setter that getter and setter will not be used. This is verified to work with srfi-9. From a man with a strangly twisted head /Stefan
