In these pages I have touched on many subjects relating to custom made golf clubs, however, I don't discuss club heads or club head design; it's a massive subject that does not lend itself to abbreviation, best dealt with on an individual basis where personal preference can be taken into account.
However, I would like to make two pertinent points on this subject:
Firstly, don't be too quick to discard your old club-heads on the strength of a Glossy Ad pushing the latest technology or the endorsement of your favorite Tour Pro.
Secondly; if you're not getting on with golf clubs, the problem, in all probability, will not be the club-heads design.