Have made an upgrade for brake fluid level sensor. Hopefully it will work better then the original cork 
I didn’t want to replace the whole brake fluid reservoir, so I upgraded only the lever sensor, keeping the original look.
I bough a generic fluid level sensor in my local electronics shop and gutted the old sensor from the cap.
Had to drill a hole for the new sensor, but otherwise modification was really simple. I know from my experience that few photos sometimes are worth more then thousand words so here they are:
