The solution is simple without disturbing the VFO capacitors value's we just need to change C13 in the FLL Freq counter from 22PF to 47 PF. I tied this and it works fine. Here is a picture of FLl Freq counter with FLL C13 that has to be changed to 47PF
I must admit that T50-6 is much much better with no drift at all. in the VFO. I was able to have a qso with VU2YK on this Sunday for more than 15 minutes with a very stable VFO with zero drift . Also I took a video of Bitx3B showing the freq stability. This Video taken with the antenna not connected, just to check the VFO on power on.