Yaser Sb.,
You give me too much credit. Maybe I am responsible for 5% share of pushing you. For the remaining 95% credit goes to you.
As far as shaping the operating levers goes, the only reason for opening the subject was to say that the new fabricated levers can be made to look pretty. I agree with your thinking about that after everything gets to work properly.
Regarding the brake lever return problem, see the picture below, I have photoshoped a brake return spring. I think of you put a strong spring similar to the one in the picture, the lever should return back. However a spring anchor has to be made at location 'A'. This can be done by drilling a hole 12 or 13mm diameter, then use a 10mm bolt of suitable length with two nuts. One on either side of the plate. In this manner one end of the spring (location A) can be secured, The other end (location B) will need just a 10mm pin or bolt welded to the actuating lever as shown in the picture. I think you will also need a place for the actuating lever to come to rest after the spring brings it back (a pedal stop). Otherwise the brake pedal will come up too much.
For the gear side, if you have too much play, you can reduce the hole size by welding the hole in the actuating lever bush to a smaller size, then take the actuating lever to the lath shop and machine out the EXACT size you need. Another trick to getting the gear side actuating lever more stable is to make the bush area wider than it is now.
