Yes the seat and springs are fully functional. The front bracket (see pics) was made to my design to try out this concept. It pivots at the front and compresses the springs to the rear. The springs are so firm it only moved a little which it good as I would not want it impacting the fender. But it does move enough to offer additional suspension. The whole set up stays perfectly in line, no issues at all.
Thank you for that. I know I'm dancing to my own tune with my build, so it's not as popular as some builds but I'm fine with that and embrace all my little eccentricities. I'm really inspired by the bikes of the 1930's (see pic) but love the reliability/ride-ability of the modern bikes.
After adjusting the seat more forward yesterday it's much better. It's certainly good enough for me to ride and live with this for a while, if I continue to like it I will look at permanent brackets to clean the whole concept up.
The big 'shocker' (pun intended) has been how it has improved/altered the suspension/comfort. I thought it might improve things but not to this extent. I still need to get a longer ride in to see how she does.