1234 sorry here too, but maybe some of this is applicable to yer problems.
roland, i ruled out bentonite early on only cause there are no bentonite deposits anywhere close to me. the best bentonite comes from WY or TX, and for you it might be a real good option......the type of clay i used (kaolinite) has a far lower "shrink/swell" characteristic than bentonite. bentonite is a huge "sweller" and if not available in bulk, should be available in different sieve sizes - at a minimum from powder (gel) through 1/2" (chip size) but of course you'l pay more for the processed stuff...i dont know my TX geography at all, if McKinney is close to any natural deposits yer in great shape.
