Lefy Max FFD Compresion setting?

Hi
After playing with oil weights I have found that 5wt gives me perfect rebound but a very harsh ride over square edge hits....

I went do to 3wt today and find that the fork is like a pogo stick... hardly any rebound dampening ... but seems to be smoother over roots...

is there any way to modify the compression piston so that I can use the 5wt oil for the rebound but not the over damped compression ... was thinking of drilling a small port hole so the oil can flow through easier when hitting something?

anyone got any suggestions ? I am trying to source a tpc setup but they are so scarce at the moment.

Thanks