hi xcracer, i've just checked the bionicon website they do a full sus where the angles are adjustable, however what i am proposing is that as the fork compresses a series of linkages will alter its angle relative to the frame so that the headtube angle never changes by more that .25 of a degree throughout full compression of the fork. Many systems seem to exist which allow you to change the angles of the bike, but these are all still affected as the bike rocks forward (on a hardtail) through suspension compression. Whereas my design from 0mm compression to 90mm compression will have near enough a 73 deg head angle and around say50mm rake, whereas a traditional system would have 70 deg head angle and 50mm rake at 0mm compression, but at 90mm compression it would have a 75 deg head angle and over 60mm rake. I feel that removing this inconsistancy from the geometry would be beneficial to control on the bike. However that is just what i think and i would welcome any thoughts, if you feel it is unnecessary, or if you like that variation in handling under compression, like the steering getting a little quicker?

thanks for your comment.