External gear, control modules, automation of dif parameters

Hello, A4newbie here having the A4 only for about 3weeks and really enjoying this wonderful machine but…
I bought this machine in the first place to be able to sequence my MS20 or minibrute or both. That is working really well but wanna try more…

For example:

-controlling both filters from the ms20 (like Cenk did in the youtube video) What could be the setup on the a4 for the filters? Value Lin? Or do you simply need to S or V trig it with a decent length? I tried everything but think i’m missing something.

-disabling the LFO of the ms20 and letting the A4 in control?

-starting the sample n hold on the ms20 with the A4?

Please help me out if someone can. thx a lot elektronauts.