How to make rail adaptor

I would like to mess around with my seat angle. So dose any body knw how to “make” a rail adaptor??
Or any ideas??


basically, a rail adaptor is a curved plate with holes to attach to the saddle (picture the plate at the top of a seatpost but a bit larger).
And on this plate, there is two U-shaped rods welded on the front and on the back that form the rails used on regular bike seatpost.

You can look on the internet for KH rail adapter to see more in details (the KH adapter has also a piece of tubbing for brake mount but it isn’t mandatory).

If you are not into steel work and welding, your best bet is to find a shop or somebody with a KH rail adapter (or to buy the KH adjustable seatpost that no longer require such adapter).